Incumbent Officeholders Have Various Reasons for Raising Significant Sums of Money.One

Incumbent officeholders have various reasons for raising significant sums of money.One common reason is that:

A) incumbent officeholders often face primary challengers and need money for two elections
B) high-quality potential challengers are less likely to run against the incumbent
C) outside interest groups will not contribute money to incumbents who lack significant sums of money
D) incumbent officeholders can use any leftover campaign funds for personal use once they retire
E) incumbent officeholders can transfer the money to lobbying firms, which in turn can repay this favor later by hiring the incumbent officeholder when he or she retires from office