Editor
Which of the following is the associative law for sets
Difficulty: Easy
A: 

$A\cup (B \cup C) = (A \cup B) \cap C$

B: 

$A\cup (B \cup C) = A \cap (B \cup C)$

C: 

$A\cup (B \cup C) = (A \cup B) \cup C$

D: 

None of these

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