A student is running a 5-kilometer race. He runs 1 kilometer every 3 minutes. Select the function that describes his distance from the finish line after x minutes. (1 point) A.f(x) = − 1 over 3 x + 5 B.f(x) = − 1 over 5 x + 3 C.f(x) = 1 over 5 x + 5 D. f(x) = 1 over 3 x + 3