A = {1, 3, 5, 7, 9}

B = {2, 4, 6, 8, 10}

C = {1, 5, 6, 7, 9}

A ∩ (B ∩ C) =

a.) {1, 3, 5, 6, 7, 9}

b.) {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}

c.) {}

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