Find the Point(s) on the Graph of F Where the Tangent

Multiple Choice

Find the point(s) on the graph of f where the tangent line is horizontal. $f(x) =x^{8} e^{-x}$

A) $\left(8, \frac{8^{8}}{e^{8}}\right)$
B) (0, 0)
C) (0, 0) , $\left(8, \frac{8^{8}}{e^{8}}\right)$
D) $\left(1, \frac{1}{e}\right)$