Which verb form correctly completes the sentence? Is the verb singular or plural?

A bedroom with a green ceiling and purple walls __________ been his request since he was six years old.

A.
have, plural

B.
has, plural

C.
has, singular

D.
have, singular

@naxve

Question

Which verb form correctly completes the sentence? Is the verb singular or plural? 

A bedroom with a green ceiling and purple walls __________ been his request since he was six years old.
 
 A.
have, plural
 
 B.
has, plural
 
 C.
has, singular
 
 D.
have, singular

@naxve

anonymous · Answer

I don't know if you got the answer already but it's has, singular. :)