Which sentence has an incorrect shift in pronoun-antecedent agreement?

whats the sentence i cant answer it unless we have the sentence

Answer a the dog did not know where its stick at got answer be both of the girls were so pleased with their new dresses answer see Hilda and Brian presented his report to the entire class. Answer D after all the children had finished lunch. They all took a nap

Explanation:

true. the definition explains it: a word or phrase that modifies or qualifies an adjective, verb, or other adverb or a word group, expressing a relation of place, time, circumstance, manner, cause, degree, etc. this is a dictionary definition that i have looked up in a dictionary.