English grammar error-spotting (preposition with ‘‘awake’’—‘‘awake to’’ not ‘‘awake in’’): Find the single erroneous segment among A–D; choose ‘‘No error’’ only if none is wrong. Focus on idiomatic preposition after ‘‘awake’’: ‘‘Locke's treatises on government toleration and education / show a mind fully awake in / the possibilities of social reconstruction. / No error.’’

Difficulty: Easy

Correct Answer: show a mind fully awake in

Explanation:

Given data

Concept / Approach
The idiom is ‘‘awake to’’ meaning ‘‘alert to; aware of’’. ‘‘Awake in’’ miscollocates the preposition.

Correction
‘‘… show a mind fully awake to the possibilities of social reconstruction.’’

Verification
The sentence now reads naturally and preserves the intended meaning of intellectual alertness.

Common pitfalls

Using ‘‘in’’ by analogy with ‘‘interested in’’—different verb, different pattern.

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