Let A, B, and C be sets. Are the following statements true or false? In the case, provide a proof or exhibit a counterexample.
(a) A ∩ B = A if and only if A c B.
(b) (A ∩ B) ∪ C = A ∩ (B ∪ C).
(c) A ∩ B = Ø→ A ≠ B.
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