Read the following passage carefully and then answer the question that follows by choosing the best option out of the four alternatives. Passage: Another marvel on the far side of the lake was a little farm that felt like a secret inside the busy city. Some of the thin Karnataka labourers even looked away when children came to dig in the soil and eat what they found. However, on this side of the lake, the greatest pleasure for the children was the jamun tree. A few months earlier, Kalu and Sunil had enjoyed a feast sitting in its branches, shaking down a few berries for their friend Mirchi. At that time they discovered the second coolest thing about the jamun tree, namely that there were parrots nesting in it. Since then, some other road boys had been capturing the parrots one by one to sell at the Marol Market, but Sunil convinced Kalu that the birds should be left free. Every morning Sunil listened for the parrots squawking to make sure they had not been abducted during the night. Kalu was an expert in searching the recycling bins inside airline catering compounds. Private waste collectors emptied these large dumpsters regularly, but Kalu had mastered the schedule of the trash trucks. On the night before collection, he would climb over the barbed wire fences and raid the overflowing bins. In time, this routine became known to the local police. He kept getting caught until some constables proposed a different arrangement. Kalu could keep his metal scrap if he agreed to pass on any information he picked up on the road about local drug dealers. Question: How did Kalu manage to raid the airline recycling bins before they were emptied, according to the passage?

Introduction / Context:
This reading comprehension question asks about Kalu's method for raiding recycling bins before they were emptied. It tests your ability to connect different pieces of information in the passage and understand the sequence of events related to Kalu's activities around the trash trucks and airline catering compounds.

Given Data / Assumptions:
- The passage says that private waste collectors regularly emptied the dumpsters.
- It also states that Kalu had mastered the trash truck schedule.
- Kalu climbed over barbed wire fences the night before pickup to raid the bins.

Concept / Approach:
The key idea is that Kalu timed his raids based on when the trash trucks would arrive. By mastering the schedule, he knew exactly when the bins would be fullest, just before collection. Thus, the method by which he managed to raid the bins in time was his knowledge and use of the trucks schedules, not simply speed or bribery.

Step-by-Step Solution:
Step 1: Identify the part of the passage that describes Kalu's expertise and routine. Step 2: Note the sentence that private waste collectors regularly emptied the dumpsters, but Kalu had mastered the trash truck schedule. Step 3: Read the next sentence, which explains that on the night before pickup he climbed over the barbed wire fences and raided the bins. Step 4: Understand that the important factor is not just his ability to climb fences, but his knowledge of the timing. Step 5: Choose the option that highlights his mastery of the trucks schedules.

Verification / Alternative check:
If Kalu did not know the schedule, he might arrive after the bins had been emptied or when security was tighter. The passage emphasises his mastery of schedule as his main advantage. When you look at the options, Option C captures this by stating that he had mastered the trash trucks schedules. The other options either mention only part of the description or introduce ideas not found in the text.

Why Other Options Are Wrong:
Option A, "He was an expert and worked very fast", is vague and does not mention the key detail of schedule. Option B, "He jumped over the barbed wire fences by day", is partly true about fences but wrong about the time, since he operated on the night before pickup. Option D, "He worked only at night inside the compounds", focuses on time but ignores the scheduling factor and overstates "only at night". Option E, "He paid the private waste collectors", invents a detail that the passage does not mention at all.

Common Pitfalls:
Students may latch onto colourful details such as barbed wire fences and night work, forgetting that the question asks "How did he manage to raid the bins before they were emptied". It is the combination of timing and schedule knowledge that explains this, not simply climbing or working fast. Always identify the key phrase in the question and then check which detail in the passage directly answers that phrase.

Final Answer:
Kalu managed to raid the recycling bins before they were emptied because He had mastered the trash trucks schedules.