If n and m are integers and n2 m2 is even, which of the following is impossible?
a) n and m are even
b) n and m are odd
c) n + m is even
d) n + m is odd
e) none of these are impossible

The question is asking to choose among the following choices among the following choices that could be the impossible base on the said given data, in my research and further analysis, I would say that the answer would be letter D. n+m is odd. I hope you are satisfied with my answer