小孟工业园站
贵阳北站
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 小孟工业园站 and 贵阳北站 (except for this two stops)? 
A) 6 
B) 22 
C) 18 
D) 13 
