The students in a gym class ran for 12 minutes and then played kickball for 33 minutes.

How long in all did the students exercise?

A.
50 minutes

B.
45 minutes

C.
35 minutes

D.
21 minutes

The students exercised for a total of 45 minutes (12 minutes of running + 33 minutes of kickball). Therefore, the answer is B. 45 minutes.