天鹅湖东站
量子科学中心站
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 天鹅湖东站 and 量子科学中心站 (except for this two stops)? 
A) 7 
B) 20 
C) 26 
D) 16 
