Bjornslokka Station
Nationaltheatret Station
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 Bjornslokka Station and Nationaltheatret Station (except for this two stops)? 
A) 24 
B) 6 
C) 19 
D) 13 
