Answer:
The answer is C.
Step-by-step explanation:
The reason why it's not A. : A delusion and a snare. Sound and fury signifying nohting. "A delusion and a snare" is a fragment because it does not have on complete thought. A delusion and a snare, what? It is often helpful to ask what they are supposed to be doing. "Sound and fury signifying nohting" is lacking what sound and furry, where are they coming from? B. The first "sentence" is incomplete as discussed in A. The second "setence" is improperly using the word they, you cannot say "they was". C. With sound and fury signifying nothing, the battle was both a delusion and a snare. This sentence states a clear thought. It is the only sentence from this list that actually would make sense saying aloud.
Hopefully this will help you :)