Which sentence uses a verb that agrees with its subject?

A.
Why was Kelly laughing?

B.
Behind those walls were a large underground vault.

C.
Where is the moose's antlers?

D.
Has your parents already written to the manager?

@NeonStrawsForever

Question

Which sentence uses a verb that agrees with its subject?	
 
 A.
Why was Kelly laughing?
 
 B.
Behind those walls were a large underground vault.
 
 C.
Where is the moose's antlers?
 
 D.
Has your parents already written to the manager?

@NeonStrawsForever

anonymous · Answer

@Desireelover 
@Mr_Perfection_xD 
@snozberry

anonymous · Answer

Direct answer or step by step up to you

anonymous · Answer

What Ever Works For You

anonymous · Answer

The answer is A