Shondra is walking 5,000 feet for a charity fund-raiser. She walks at a rate of 255 feet per minute, m. Which equation represents d, the remaining number of feet Shondra has to walk?
A. d = 5,000m - 255
B. d = -5,000 + 255m
C. d = -255 + 5,000
D. d = 5,000 - 255​