Gabriel is at the grocery store, and wants to figure out his total cost before he gets to the register. He bought 2.5 pounds of apples that are x dollars a pound and 2 bags of lettuce for y dollars each. Gabriel remembers he has a coupon for $2 off his bill. Which expression gives the new amount he will pay?
A. 4.5xy-2
B. 2y+2.5x+2
C. 2.5y+2x-2
D. 2y+2.5x-2