中山路站
呼和浩特体育场站
Please solve the multiple choice problem and put your answer (one of ABCD) in one "\boxed{}". According to the subway map, how many intermediate stops are there between 中山路站 and 呼和浩特体育场站 (except for this two stops)? 
A) 20 
B) 17 
C) 3 
D) 18 
