Despite Some Obvious Advantages of Straight Commission, It Has a Number

Despite some obvious advantages of straight commission, it has a number of drawbacks which include:

A) encourages salespeople to secure only the best accounts in their territories.
B) non-selling activities are apt to be neglected.
C) salespeople are tempted to sell themselves rather than the company.
D) both b and c of the above.
E) all of the above.