Which verb agrees in number with its subject?

The bark of sequoias __________ sometimes two feet thick.

A.
were

B.
are

C.
is

D.
have been

Question

Which verb agrees in number with its subject? 

The bark of sequoias __________ sometimes two feet thick.
 
 A.
were
 
 B.
are
 
 C.
is
 
 D.
have been

anonymous · Answer

help

atsie · Answer

@blackandyolle 
Hello there!
Welcome to OpenStudy!
So firstly, it really helps when you read the sentence out loud and then read all the options out loud with it. To help tune into which word is going to tune into the sentence perfectly.
So, for the moment do you by chance have a guess?

anonymous · Answer

b

atsie · Answer

Alright, B is a possibility.
Now, if there is one that we had to eliminate from the options, which would you pick?

anonymous · Answer

d

atsie · Answer

Good! Yes, thats exactly one that we'd eliminate.
Another one we'd eliminate is C because it doesn't sound right does it? It doesn't agree.
Also, A is a form of past tense that would I think disagree with the sentence seeing as we have no context to go off of. 
So I'd pick B with you! :)

anonymous · Answer

thx

atsie · Answer

No problem! :)
I hope you enjoy your stay at OpenStudy!