If $A$ and $B$ are two independent events,then $P(A \cup B) = $
- A$P(A) + P(B) - P(A)P(B)$
- B$P(A) - P(B)$
- C$P(A) + P(B)$
- D$P(A) + P(B) + P(A)P(B)$
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