While Sales Contests Can Motivate Employees at All Levels to Participate

While sales contests can motivate employees at all levels to participate, a disadvantage of this method of sales promotion is that

A) they are often too complicated.
B) they are not taken seriously by the employees.
C) people often discontinue their positive behavior after the contest is over.
D) many point-of-purchase display materials are needed to implement a contest.
E) people often feel they are not being recognized enough.