I believe it’s “entertaining”, I asked a second person also and they said the same. Hope this helped!
The correct answer is preposition, over; object of the preposition, bridge
The other options are not correct because our, and and loudly are not prepositions
The purpose of a is to help you organize your paper by checking to see if and how your ideas connect to each other. it would say D.
Is that supposed to be a true or false question???