The following sentence has been split into four segments. Identify the segment that contains an error.
Kevin must help / his sister brush off / her French before / she leaves for Paris.

Correct option is D

The incorrect segment is (d) his sister brush off.
· The phrase "brush off" is incorrect in this context. The correct phrase should be "brush up" because:
· "Brush up on" means to improve or refresh one's knowledge or skill in a subject.
· "Brush off" means to dismiss or ignore something, which does not fit the meaning of the sentence.
Correct Sentence: "Kevin must help his sister brush up on her French before she leaves for Paris."
Grammatical Rule Used:
· "Brush up on" is a phrasal verb that means to improve or refresh one’s knowledge in a subject.
· Example: She brushed up on her Spanish before traveling to Spain.