哪句才對?謝謝!!!!!

Only A is correct.

B is wrong. There is no "s" at the end of "likes". "s" has been added to "does" for the third person singular subject "your mother". There is no need for "s" at the end of the verb.

C is no good. The first "tea" is redundant.

A. Which type of tea does your mother like? ONLY A IS CORRECT!!!!!!!!!!!!!!!
B What type of tea does your mother likes?<----------WRONG!
What .... does your mother like?
This is a question! " like" <-- no s's
Example:
What does she like?( THIS IS A QUESTION TOO. )
______________________
C. What tea type of tea does your mother like? WRONG!
What type of tea...<-----CORRECT NOW!!!!!!!!!!!!

O_O
886

Answer A only.
Answer B is wrong. It should be written as "What type of tea does
your mother like".
Answer C is wrong.
The difference between A and B is:
A is talking about when you are having variety selection of tea type on hand before you ask.
B is talking about when you don't know have any selection on hand before you ask.

A&B should correct, therefore C is incorrect!
Let' s me see these, sentence C:
What tea typeof tea does your mother like?
"tea" this word is repeatly(two times)
& "like" should change to "likes"

A、B 都對

A. Which type of tea does your mother like?
您的母親喜歡什麼樣的茶？

B. What type of tea does your mother likes?
您的母親喜歡哪種類的茶？

A和B也對。C不太通順，應改成What type of tea does your mother like ?