Which verb agrees with its subject?

Your friends or their guest __________ cooking the meal.

A.
is

B.
have been

C.
are

D.
were

I'm not sure at all what this is but I think we can eliminate b?

Question

Which verb agrees with its subject? 

Your friends or their guest __________ cooking the meal.
 
 A.
is
 
 B.
have been
 
 C.
are
 
 D.
were

I'm not sure at all what this is but I think we can eliminate b?

anonymous · Answer

a

anonymous · Answer

The answer is C. Because the question is, what is the verb that goes with the subject.

anonymous · Answer

"Your friends or their guest are cooking the meal"

anonymous · Answer

Well i might be incorrect what do you think?

prominer10000 · Answer

I'm not sure :/