How is the underlined noun clause used in this sentence?

What I want to know is how we are going to pay for this.

A.
subject

B.
direct object

C.
predicate nominative

D.
object of a preposition

Question

How is the underlined noun clause used in this sentence? 

What I want to know is how we are going to pay for this.
 
 A.
subject
 
 B.
direct object
 
 C.
predicate nominative
 
 D.
object of a preposition

jabez177 · Answer

A.

kendricklamar2014 · Answer

"how we are going to pay for this." is underlined. Is that correct?

jabez177 · Answer

My bad!! 
Yeah.

kendricklamar2014 · Answer

Ok, just checking :D 

I believe the answer is D because for is a preposition.

jabez177 · Answer

But that's in the end... :/

kendricklamar2014 · Answer

Thats what just came to my mind right now. Im leaning towards A or B.

jabez177 · Answer

A direct object is a noun or pronoun that receives the action of the verb.

jabez177 · Answer

"Is" is a verb but it is not a noun or pronoun... 
So I think it's A.

kendricklamar2014 · Answer

Ahh I see your point. Your right

jabez177 · Answer

Okay. :)