If \(n\) is an integer, and \(x^{n}\) is positive for all nonzero real numbers \(x\), which of the following must be true about \(n\)?

W) \(n\) is greater than zero

X) \(n\) does not equal zero

Y) \(n\) is even

Z) \(n\) is odd
Y) \(n\) IS EVEN