In this idiom and phrase question, choose the option that best explains the expression "method in his madness" as used in the sentence about a presentation.

Introduction / Context:
This question focuses on the idiomatic expression "method in his madness". The expression is used when someone appears to be acting in a strange or irrational manner, but there is actually a logical plan or purpose behind their actions. You are given a sentence about a presentation and must pick the option that correctly explains the meaning of the idiom as used in that sentence.

Given Data / Assumptions:

• The sentence describes a person whose behaviour at the start of a presentation seems odd or irrational.
• Four explanatory options are given, each trying to capture what the phrase implies.
• Only one option should match the well known idiomatic meaning.

Concept / Approach:
The idiom "there is method in his madness" means that although someone behaviour appears crazy, foolish, or disorganised, there is actually a clear strategy or rational goal hidden beneath the surface. In the context of a presentation, it suggests that what initially looked confusing or nonsensical later turns out to be purposeful and well thought out. The correct option must therefore mention both the apparent absurdity and the eventual discovery of a rational purpose or structure.

Step-by-Step Solution:
Step 1: Restate the idea of the idiom. It describes hidden logic behind apparently mad actions. Step 2: Examine option A. It says he deliberately chose to be vague and absurd. This focuses on deliberate vagueness but does not clearly mention that there was a rational purpose discovered later. Step 3: Examine option B. It states that although the presentation appeared absurd at first, the audience eventually realised that he had a rational purpose behind it. This captures both the initial confusion and the later understanding. Step 4: Examine option C. It simply notes a stark difference between the start and the conclusion but does not mention hidden logic or planning. Step 5: Examine option D. It suggests that he was not in his senses and presented awkwardly, which supports the idea of madness but ignores the idea of method or rational plan. Step 6: Conclude that option B most accurately reflects the meaning of the idiom in this context.

Verification / Alternative check:
You can verify by matching the option with the standard dictionary meaning of the idiom. Dictionaries usually explain "method in madness" as apparent foolishness that actually hides a sensible purpose. Option B follows this pattern exactly: initial appearance of absurdity followed by recognition of rational intent. Options A, C, and D leave out one of the essential aspects, either the sense of hidden logic or the contrast between how things looked at first and how they appear in the end.

Why Other Options Are Wrong:
Option A is incomplete because it emphasises deliberate absurdity but not the later discovery of order or purpose. Option C is too vague and focuses only on a difference between beginning and end, without indicating that the original madness had a structured goal. Option D misinterprets the phrase by suggesting that the speaker was simply not in his senses; it fails to convey that there was an underlying method. The idiom does not imply that a person is genuinely senseless; it emphasises the surprising presence of a plan where there appeared to be chaos.

Common Pitfalls:
A common mistake is to focus only on the word "madness" and ignore the word "method". Students often assume the phrase means genuine insanity, whereas the whole point of the idiom is the combination of apparent craziness with real logic. Another pitfall is selecting answers that sound dramatic but lack a clear link to rational purpose. When you see such idioms, always look for options that bring out both sides of the contrast: appearance versus reality, chaos versus order, or confusion versus planning.

Final Answer:
The idiom "method in his madness" in this presentation context is best explained by the option: Though his presentation appeared a little absurd in the beginning, we ultimately found out that he had a rational purpose behind it.