Official Explanation:Statement (1) by itself is sufficient. All the variables equal zero, and the product of the variables is zero; therefore their product is even.My issue here is: is 0 an even number? I thought it was neither even nor odd. I've made flashcards where I put in this statement, but I don't remember the source. So I'm confused about 0 now. Help?!
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.
The correct answer is A.
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