Question

Which sentence has an unclear or missing pronoun antecedent?

Answer 1

A--You know the person (Henry) and the topic (paying for a movie ticket).
B--You know the people (the twins) and the topic (plans for their party).
D--You know the person (my mother) and the topic (lost an earring).

BUT for C there is a very vague sentence that makes you question: what is it that they wouldn't enjoy? So it is C.

Answer 2

Yea its C because it's not as specific as the rest are.