Answer:
The sentence that does not include an error in pronoun-antecedent agreement is:
A. Luis visits Mayan ruins to study its ancient architecture.
Explanation:
The reason behind this answer is that the pronoun-antecedent agreement is the concept to define the match between the pronoun and the number of persons it reefers about. Making it plural or singular. In our case the only one that doesn't have an error in this area is the a) option. Because B is talking about many pyramids. But the pronoun preceding the sentence is singular. As well as c) signals only on the pyramid when talks about a great number. In a) we are talking in third person so it is right to us visits.
