内蒙古体育馆站
北山公园站
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 内蒙古体育馆站 and 北山公园站 (except for this two stops)? 
A) 5 
B) 17 
C) 0 
D) 20 
