Which one of the following statements is incorrect with regard to some relationships of probability?

• A. If two events A and B are mutually exclusive, then P(A and B) = 0.
• B. If two events A and B are independent, then P(AB) = P(B).
• C. Given P(A and B) = 0.4 and P(B) = 0.5. If A and B are independent, then P(A) = 0.8.
• D. If two events A and B are complementary, then A and B must be mutually exclusive.
• E. If two events A and B are complementary, then P(A) + P(B) = 1.