How is the infinitive phrase used in the sentence?

To prepare for the exam, study a little bit each night.

A.
adverb

B.
noun as subject

C.
noun as direct object

D.
adjective

I know what the gerund phrase is....And I'm going to cross out C because gerund phrases aren't used for direct objects from what I've heard...

Question

How is the infinitive phrase used in the sentence? 

To prepare for the exam, study a little bit each night.
 
 A.
adverb
 
 B.
noun as subject
 
 C.
noun as direct object
 
 D.
adjective

I know what the gerund phrase is....And I'm going to cross out C because gerund phrases aren't used for direct objects from what I've heard...

anonymous · Answer

@happyrosy

anonymous · Answer

Derp...I meant Infinitives phrases. U.U

anonymous · Answer

Lol I would go with A. adverb. "To prepare for the exam" is the infinitive phrase and explains "why" you should "study a little bit each night."

anonymous · Answer

Alright. xD Ah, I should study moreeeee.~

anonymous · Answer

Haha lol