There is a futures contract for the purchase of 100 bushels of wheat at $2.50 per bushel. At the end of the day when the market price of wheat increases to $3.00 per bushel: Select one: a. the buyer (long position) needs to transfer $50 to the seller (short position). b. nothing happens since marked to market adjustments only take place when the market price falls below the contract price. c. nothing happens since with a futures contract all payments are made at the settlement date. d. the seller (short position) needs to transfer $50 to the buyer (long position).