I didn’t like the art exhibit because they seemed too abstract and hard to understand.
Which revision clarifies the vague pronoun “they”?

A. I didn’t like the art exhibit because it seemed confusing.

B. I didn’t like the art exhibit because of how it was.

C. I didn’t like the art exhibit because the paintings seemed too abstract and hard to understand

D. I didn’t like the art exhibit because it wasn’t good.