Purchasers and Sellers of Futures Are Generally Required to Deposit

Purchasers and sellers of futures are generally required to deposit an initial margin in the range of ___________ with the exchange's clearinghouse to reduce credit risk.

A) 15 to 20 percent
B) 15 to 20 dollars
C) 10 to 15 percent
D) 10 to 15 dollars
E) none of the above.