Suppose That a Futures Trader Has Deposited the Initial Margin

Suppose that a futures trader has deposited the initial margin of $2,000 in her brokerage account.The maintenance margin is 75 percent.The value of the account falls to $1,100.The account holder has to come up with a variation margin of:

A) $300
B) $400
C) $500
D) $900
E) $1,100