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If A and B are sets whose union is B, then it must be true that
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If A and B are sets whose union is B, then it must be true that

If A and B are sets whose union is B, then it must be true that-example-1
User Braudy
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Since A and B are sets whose union is B, then it is true that A is a subset of B

Answer: A.

User JerryOL
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