How is the gerund phrase used in the sentence?

My hobby is surfing every weekend.

A.
predicate nominative

B.
object of a preposition

C.
subject

D.
direct object

I have an idea of what this is....I could cross out C...

Question

How is the gerund phrase used in the sentence? 

My hobby is surfing every weekend.
 
 A.
predicate nominative
 
 B.
object of a preposition
 
 C.
subject
 
 D.
direct object

I have an idea of what this is....I could cross out C...

anonymous · Answer

A. predicate nominative is correct. 
"is surfing every weekend" is your complete predicate while "surfing" is the nominative part of the predicate.

anonymous · Answer

Oh! That makes sense ^^. Thanks a bunch.

anonymous · Answer

You're welcome!