Let a, b, c, and d be real numbers such that a > b and c > d. Which of the below statements are true?
(A) a/c > b/d
(B) a^2*c^3 > b^2*d^3
(C) a^c > b^d
(D) c/a > b/d
(E) a^2*c^2 > b^2*d^2.
(F) a^3*c^3 > b^3*d^3.
