Identify the sentence with the INCORRECT usage of adverb.

Correct option is C

Option (c) contains the adverb usage error.
Explanation: The phrase “slightly” (adverb) is wrongly placed. The correct structure is:
“Merry was slightly more aware of the implications than her colleagues.”
Grammar Rule Used:
✔ Adverbs modifying adjectives/adverbs should be placed directly before the word they modify.
Example:
✘ She was aware more of the rules slightly.
✔ She was slightly more aware of the rules.
�� Information Booster:
Adverb placement affects sentence clarity and must follow correct positioning near the adjective/adverb it modifies.