Which of These Statements Is Correct

Which of these statements is correct?

A) Candidates from both major parties spend such enormous amounts of money on campaigns that the amount spent by either candidate has little relationship to the final outcome.
B) Incumbents are reelected in such high numbers that they are able to spend relatively limited funds and are usually outspent by their opponents.
C) Federal campaign laws now strictly limit the amounts of money that can be spent campaigning for Congress.
D) Although the candidate who spends the most money does not always win, the amount of money spent is related to the probability of winning.
E) Challengers typically receive more PAC money than incumbents.