梁家河站
潘家湾站
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 梁家河站 and 潘家湾站 (except for this two stops)? 
A) 1 
B) 18 
C) 8 
D) 17 
