A noun formed from a verb or corresponding to a verb is called verbal noun
A prepositional phrase has to start with a preposition, and the only option here which starts with one is D, 'during the darkest night', where 'during' is a preposition.
Answer: It might be C or A but correct me if i’m wrong
Explanation:
I think the answer A. is a good one. As long as you have the evidence to prove it, it would be A.