Which of the Following Is True of Salespeople

Which of the following is true of salespeople?

A) They can benefit tremendously by working from a continually evolving knowledge base.
B) They adhere to a universal code of ethics.
C) They enjoy relatively less job security compared with other occupational groups .
D) They receive professional training through a widely accepted certification program.
E) They are constantly supervised by their managers and lack decision-making autonomy.