八涧堡站
姜家庄站
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 八涧堡站 and 姜家庄站 (except for this two stops)? 
A) 13 
B) 15 
C) 0 
D) 12 
