An S&P 500 Index Futures Contract Is Valued at $250

An S&P 500 index futures contract is valued at $250 times its index level. Laura sells an S&P 500 futures contract with a September settlement date when the index is 2550. By the settlement date, the S&P 500 index falls to 2450. The profit (or loss) on Laura's position in the S&P 500 futures contract is

A) $15,000.
B) - $15,000.
C) $25,000.
D) −$25,000.
E) 0