If You Were a Sales Manager, Which of the Following

If you were a sales manager, which of the following would you consider to be a signal of plateauing among your salespeople?

A) a loss of interest in prospecting.
B) a lack of follow through in customer service.
C) a reduction in working hours.
D) none of the above would be considered a signal of plateauing.
E) all of the above would be considered a signal of plateauing.