咸宁路站
国际港务区站
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 咸宁路站 and 国际港务区站 (except for this two stops)? 
A) 21 
B) 10 
C) 23 
D) 0 
