How is the underlined pronoun in the sentence used?

Whom are you calling?

A.
direct object

B.
subject

C.
object of a preposition

D.
predicate nominative

The underlined word is whom.

Question

How is the underlined pronoun in the sentence used?

Whom are you calling?
 
 A.
direct object
 
 B.
subject
 
 C.
object of a preposition
 
 D.
predicate nominative

The underlined word is whom.

anonymous · Answer

it is b

anonymous · Answer

Thanks.  I'm going to make you best response and give you medal because that's what I was thinking.
@unicorn2003

anonymous · Answer

Can you help me with more? @unicorn2003

anonymous · Answer

sure

atsie · Answer

@unicorn2003 
Hiaa there! 
I feel the need to give a friendly reminder to you because you gave a direct answer to @rainbowunicorn0 .
It say's in the OpenStudy Code of Conduct that you cannot do that. You have to help GUIDE a person to the answer.
Besides, this is a new user so its extra important to set the example and follow the rules.

anonymous · Answer

Im going to make a new question and tag you.

anonymous · Answer

im sorry this is my 3 dayon here

anonymous · Answer

Im closing this question so I can post another one.

anonymous · Answer

After you are done replying.