Which of the Following Is NOT a Reason Why Incumbent

Which of the following is NOT a reason why incumbent politicians work so hard to raise campaign funds?

A) The money increases their personal worth because they are allowed to keep whatever they don't spend.
B) The money helps ward off strong competition because potential challengers are less likely to run against an incumbent who has raised a lot of money.
C) The money ensures they have enough money to fight the competition should it prove to be especially tough.
D) Their ability to raise money is a key advantage over most challengers.
E) The money allows the incumbent to run an aggressive campaign.