Which statement best describes how to determine whether f(x) = x² - x + 8 is an even function?

O Determine whether –x2 - (-x) + 8 is equivalent to x² – X + 8.
O Determine whether (-x)2 – (-x) + 8 is equivalent to x² – X + 8.
O Determine whether -x2 - (-x) + 8 is equivalent to -(x² - X + 8).
O Determine whether (-x)2 – (-x) + 8 is equivalent to -(x² – X + 8).