The sentences are:
A. To be, or not be: that is the question.
B. You may think otherwise, but what I tell you is true.
C. Trolls live under bridges; elves do not.
D. Where did you find the papers that i lost?
Answer:
C. Trolls live under bridges; elves do not.
Step-by-step explanation:
The prepositional phrase is "Under bridges."
Hope this helps you all :)