If and g are continuously differentiable functions for all real numbers, which of the follow-
ing definite integrals
is equal to f(g(4)) - f(g(2))?
(A) * f'(g(x)) dx
(B) *ƒ(g(x))f'(x) dx
(C) *f(9(x))9'(x) dx
(D) * f'(g(x))g'(x) dx
(E) *ƒ(9'(x))g'(x) dx