If * denotes a mathematical operation, does X* Y = Y * X for all X and Y?
(A) For all X and Y, X * Y = 2 (X^2 + Y^2)
(B) For all Y, 0 * Y = 2Y^2

1. statement (A) alone is sufficient but statement (B) alone is not
2. statement (B) alone is sufficient but statement (A) alone is not
3. both (A) and (B) together are sufficient but none of them alone is sufficient
4. both statements independently are sufficient
5. both (A) and (B) together are not sufficient