In each of the following questions on idioms and phrases, choose the alternative that best expresses the meaning of the idiom “wild goose chase”.

Introduction / Context:
This idiom question asks you to interpret the meaning of the phrase “wild goose chase”. Idioms are expressions whose meanings cannot be understood simply by translating the individual words. In exams and in real-life English usage, understanding such idioms is crucial for proper comprehension and effective communication.

Given Data / Assumptions:

• Idiom: “wild goose chase”.
• We must choose the option that best captures its figurative meaning.
• Options range from positive descriptions of effort to neutral or negative descriptions of adventure.
• We assume the idiom is used in its standard negative or critical sense.

Concept / Approach:
Literally, chasing a wild goose would be extremely difficult and pointless, because the goose keeps flying away and cannot easily be caught. Figuratively, a “wild goose chase” refers to a futile or hopeless search, task, or pursuit that is unlikely to produce any result. Therefore, the option that describes a foolish or unprofitable adventure fits best. It is not about whether the effort is honest or powerful, but about the fact that the goal is almost impossible to achieve or the activity is pointless.

Step-by-Step Solution:
Step 1: Recall common usage: “We went on a wild goose chase trying to find that document.” Step 2: Understand that in such sentences the speaker complains about a waste of time and effort. Step 3: Evaluate the options and look for the one that emphasises wasted effort and lack of results. Step 4: Identify “A foolish, unprofitable adventure” as capturing both the lack of sense and lack of benefit in the activity. Step 5: Confirm that none of the other options highlight the idea of futility or pointlessness.

Verification / Alternative check:
Imagine using the phrase in real-life scenarios: “Looking for his old address without any records was a wild goose chase.” Clearly, the speaker means that the attempt was almost useless and did not lead anywhere. Substituting the meaning “an admirable enterprise” or “an honest effort” changes the tone completely and fails to reflect the frustration implied by the idiom. Therefore, “a foolish, unprofitable adventure” is the closest match.

Why Other Options Are Wrong:
“An admirable enterprise” suggests a praiseworthy project, which contradicts the negative sense of “wild goose chase”.
“An honest effort” describes sincerity but not futility; a wild goose chase is not criticised for dishonesty but for pointlessness.
“A powerful effort” focuses on the strength of effort, again ignoring the idea that the effort leads nowhere.
“A successful hunt” is the opposite of what the idiom means, as a wild goose chase is generally unsuccessful.

Common Pitfalls:
Learners sometimes misinterpret idioms by focusing too much on one word, such as “chase”, and concluding that they relate to effort or speed. However, you must consider the entire expression and its established figurative meaning. To avoid such errors, make a habit of learning idioms with brief explanations and example sentences so that their real usage sticks in your memory rather than trying to translate them word by word.

Final Answer:
The idiom “wild goose chase” means “a foolish, unprofitable adventure” or a futile pursuit.