凉亭站
四泉桥站
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 凉亭站 and 四泉桥站 (except for this two stops)? 
A) 8 
B) 17 
C) 24 
D) 6 
