Which of the following are equivalent to p ^ (q V r) → (q ^ r)? a. ¬(q ^ r) = ¬(p ^ (q V r)) b. p^ (¬(¬q ^ ¬r)) = (q ^r) c. ¬((p^ (¬(¬q ^ r))) ^ ¬(q ^ r)) с.

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A:

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