In NASCAR,a Race Winner Might Win,say,$500,000,whereas Second Place Wins $450,000

Multiple Choice

In NASCAR,a race winner might win,say,$500,000,whereas second place wins $450,000.Why might NASCAR have a 10% reduction in prize money from first and second place?

A) To ensure that there is enough money to pay those who finish near last.
B) To motivate drivers to take risks they might not otherwise take.
C) To motivate drivers to not take risks they might otherwise take.
D) NASCAR is a cartel.