Answer the Question $\mathrm { n }$ Is an Even Number, Then Which of the Following Statements

Answer the question.
-If $\mathrm { n }$ is an even number, then which of the following statements is true?

A) The equation $\mathrm { x } ^ { \mathrm { n } } - 1 = 0$ has an odd number of nonreal roots.
B) The equation $\mathrm { x } ^ { \mathrm { n } } - 1 = 0$ has an odd number of real roots.
C) The equation $x ^ { n } - 1 = 0$ has $n - 1$ roots.
D) The equation $x ^ { n } - 1 = 0$ has exactly two real roots.