What is the subject in this simple sentence?

Vertebrates are animals with a backbone or spine.

A.

Vertebrates

B.
animals

C.
spine

D.
backbone

Question

What is the subject in this simple sentence? 

Vertebrates are animals with a backbone or spine.
	
	
 
A.
	

Vertebrates
	
 
B.
	animals
	
 
C.
	spine
	
 
D.
	backbone

anonymous · Answer

help please @ShadowLegendX 
@hippo4

anonymous · Answer

Which simple sentence has a compound subject? 	
	
 
A.
	Anton, Chris, and Jacob plan to volunteer this summer.
	
 
B.
	The summer break begins on June 6.
	
 
C.
	They hope to volunteer at the zoo, the museum, or the state park.
	
 
D.
	Two volunteer positions are available at the museum.

anonymous · Answer

@Kaylee_td

anonymous · Answer

the second question answer is actually A took test.