Choose the part of the sentence that contains an error:
She insisted to accompany me.

Correct option is A

Option (a) contains an error.
Explanation: The verb insist does not take an infinitive “to + V1”. The correct pattern is insist on + V-ing or insist that + clause. Hence, we should say “She insisted on accompanying me.” The rest of the sentence is fine.
Grammatical rule used:
· insist on + gerund (V-ing): “They insisted on paying.”
· insist that + subject + (should) + base verb: “They insisted that she (should) stay.” (In formal English, “should” is optional but implied.)
Example: “The passengers insisted on getting a refund.”
Information booster:
· Similar patterns: persist in + V-ing, apologize for + V-ing, object to + V-ing, succeed in + V-ing.
· Do not write insisted to go (✗); write insisted on going (✓).