科学大道站
西七里塘站
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 科学大道站 and 西七里塘站 (except for this two stops)? 
A) 24 
B) 1 
C) 20 
D) 19 
