Are the underlined words in the sentence an independent clause, a subordinate clause, or neither?

"After the sun sets", turn on the porch light.

A.
subordinate clause

B.
independent clause

C.
neither

Question

Are the underlined words in the sentence an independent clause, a subordinate clause, or neither? 

"After the sun sets", turn on the porch light.
  
 
 

 
 

  

  A. 
  subordinate clause   
   

 
 

  

  B. 
  independent clause   
   

 
 

  

  C. 
  neither

superflytyguy · Answer

Subordinate clause

superflytyguy · Answer

Independent clauses can be a sentence by itself, hence the name, independent.

anonymous · Answer

thts wht I thought

superflytyguy · Answer

Yea, after the sun sets is a fragment and can't stand alone