My Captors took me to
an underground prison [change to passive voice]

In order to convert active into passive, it is important to omit primary auxiliary verbs such as do, does or did. Words such as why, what and when remain at the same position as in the active voice. So, the correct answer is what is wanted by you.

Hope this helps!

Explanation:

in my opinion, ap calculus was the most difficult. i often struggled with it a lot. however, i have gotten a lot better.