Which statement is true? a. on every interval of x, the rate of change of f(x) exceeds the rate of change of g(x). b. at x = 2, the rate of change of g(x) is equal to the rate of change of f(x). c. as x increases, the rate of change of g(x) exceeds the rate of change of f(x). d. as x increases, the rate of change of f(x) exceeds the rate of change of g(x).