Which of the Following Statements About Campaign Spending in Senate

Which of the following statements about campaign spending in Senate elections is true?

A) Incumbents generally spend less money than challengers in Senate campaigns.
B) Incumbents and challengers generally spend the same amount of money in Senate campaigns.
C) Incumbents generally spend more money than challengers in Senate campaigns.
D) Incumbents and challengers in Senate campaigns are legally limited to spending only $2 million.
E) Incumbents and challengers in Senate campaigns are legally limited to spending only $5 million.