Ethan enters into a business contract with Riley for the purchase of 200 school desks. The contract specifically states that Riley must deliver all of the 200 desks in one week, set them up and Ethan must determine that all 200 desks are in perfect condition, or Riley must remove all the desks immediately and Ethan will owe Riley nothing. Which statement below is correct based upon the application of default rules in this situation should Riley only be able to deliver 199 perfect, according to Ethan, school desks?
a) Ethan must accept the 199 desks and pay Riley the full amount
b) Ethan can choose to reject the desks and Riley must remove them immediately
c) Ethan must accept the 199 desks but can seek damages for the missing desk
d) Ethan can refuse to pay Riley until the missing desk is delivered
