丝绸之路大道站
水上公园站
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 丝绸之路大道站 and 水上公园站 (except for this two stops)? 
A) 1 
B) 5 
C) 21 
D) 12 
