Suppose A and B are two sets. Then a set, among the following, which is not cqual to $$A \cup B$$, in general, is

A

$$(A - B)\cup(B - A)\cup(A \cap B)$$

B

$$(A^c \cap B^c)$$

C

$$(A - B) \cup B$$

D

$$A \cup (B - A)$$