If an Exercise Instructor Monitors the Effective Execution of a Class

If an exercise instructor monitors the effective execution of a class routine, and pro-actively provides technical instruction that might allow those participants to perform that routine more smoothly, this would be considered an example of

A) transformational leadership.
B) active management-by-exception.
C) passive management-by-exception.
D) contingent reward leadership.
E) laissez faire leadership.