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

The cell phones in their briefcases __________ to ring.

A.
continue, plural

B.
continues, plural

C.
continue, singular

D.
continues, singular

Question

Which verb form correctly completes the sentence? Is the verb singular or plural? 

The cell phones in their briefcases __________ to ring.
 
 A.
continue, plural
 
 B.
continues, plural
 
 C.
continue, singular
 
 D.
continues, singular

anonymous · Answer

the answer is a!

anonymous · Answer

@SurrealPower_RS Since you're new I must tell you that direct answers are NOT allowed. http://openstudy.com/code-of-conduct