三十埠东站
蜀山西站
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 三十埠东站 and 蜀山西站 (except for this two stops)? 
A) 27 
B) 1 
C) 19 
D) 10 
