challenge: What is the format of the 2012 Nicky Rackard Cup tournament?
  
  A. Round-robin - each team will play all other teams in the tournament
  B. Double elimination - each team will play at least two games before being knocked out
  C. Single elimination - each team will play only one game before being knocked out
  D. Knockout - each team will play only one game, and the winner advances
  Answer: 