challenge: What is the purpose of the Coin toss/Presidents Slap tradition in the Bristol Boat Race?
  
  A. To decide the order of the crews at the starting line
  B. To challenge the losing university to the current year's race and decide the banks each crew will race on
  C. To select the judges for the current year's race
  D. To determine the winner of the current year's race
  Answer: 