Bunuel wrote:

Official Solution:

Statement (1) by itself is sufficient. All the variables equal zero, and the product of the variables is zero; therefore their product is even.

Statement (2) by itself is insufficient. The variables can be either odd or even. If all the variables are even, their product is even; if they are odd, their product is odd.

Answer: A

Hi Bunuel, Please elaborate on this:

"All the variables equal zero, and the product of the variables is zero;"
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KUDOS please!! If it helped.

Warm Regards.

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