Which sentence uses correct parallel construction?

Last summer we enjoyed the museums, the city parks, and visiting my cousins in Virginia.
The boys and their cousins decided to go over the hill and looking for four-leaf clovers.
Astronomers use telescopes to observe celestial bodies, track their movements, and make discoveries.
I can’t decide whether to try out for the school play or maybe the volleyball team

C. Astronomers use telescopes to observe celestial bodies, track their movements, and make discoveries.

Explanation:

Parallel construction uses balance within one or more sentences of similar phrases or clauses that have the same grammatical structure.

answer: a lonely woodcutter comes by and decides to chop down the tree, while chopping, connor murphy took a nap next to the tree. waking up from the sound of chopping, he notices the tree falling on him. unable to escape, connor get hit and dies. this was the last of him.

well if u read the book you would know that she meant to