Which word in the sentence does the adjective clause modify?

My brother's teacher, who quickly answers messages, is always helpful.

A.
brother's

B.
answers

C.
teacher

D.
helpful

Question

Which word in the sentence does the adjective clause modify? 

My brother's teacher, who quickly answers messages, is always helpful.
 
 A.
brother's
 
 B.
answers
 
 C.
teacher
 
 D.
helpful

anonymous · Answer

i think c plz help i will medal and fan! @MissAcoustic

deadly_roses · Answer

i would say C. also

anonymous · Answer

with proof plz just for my sake

anonymous · Answer

i am trying to learn, but i am not very good at it lol

deadly_roses · Answer

well i would say because the rest of the sentence all focuses in on the teacher, saying how the teacher "quickly answers messages" and "is always helpful" so its adding to what we know about the teacher, or in the way we would say it....its modifying it..

anonymous · Answer

ok that makes sense thx!