divine arrived at the dancing hall at 9:16 a.m. for a zumba dance season if he left at 9:55 a.m. how many minutes did she spent at the dancing hall?

1.What is asked in the problem?
A. the time she left the dancing hall.
B. The amount of time she spent at the dancing hall
C. the time she arrived at the dancing hall.
2. What operation is to be used to solve the problem?
A. addition
B. subtraction
C. multiplication
3.what is the answer?
A. 39 hours
B. 39 min.
C. 39 sec.