I think it's C.............,..........
<span>B) While most modern zoos do not teach animals to perform "tricks," they do train animals to respond to certain commands to make them safer to handle, move and examine.
This sentence keeps all of the verbs in agreement at the end. All three "to handle, move, and examine" are in the same tense and form which is important for the sentence to be correct.</span>
The fourth one FactFinder
I think it's a preposition.
