Consider the following information: On May 1 Party A trades on the futures exchange to buy one oats contract of 10000 bushels for delivery in September. Party B has complimentary requirements. The price is $2 per bushel. Assume that the contract closes on May 2 at 190 cents per bushel. Assume the initial margin was $3000 and the maintenance margin $2500. Assume further that on May 3, the price has dropped to $1.80 per bushel. The price at which a maintenance margin call will be received is equal to:
A．
B．
C．