The sets A - B, A ∩ B and B - A are always
Aequal to one another
Bcontained in A - B
Cmutually disjoint
Dequal to U itself
Answer & Solution
Correct answer: C. mutually disjoint
An element in A - B is outside B, one in B - A is outside A, and A ∩ B lies in both, so no two sets share an element.
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