Improve the highlighted part of the sentence. Choose 'No improvement' as an answer if the sentence is grammatically correct.
He had chop the onions on the cutting board.

Correct option is C

The correct improvement is "chopped the."
Explanation: The sentence is in the past perfect tense, which requires the use of the past participle form of the verb. "Chop" is the base form, and the correct past participle is "chopped." Since the auxiliary verb "had" is used, we must follow it with "chopped."
Grammatical rule used:
In past perfect tense, the auxiliary verb "had" is followed by the past participle form of the main verb.
Example:
Incorrect: He had go to the market.
Correct: He had gone to the market.
Corrected sentence: He had chopped the onions on the cutting board.