Find All Real Solutions of the Equation $x ^ { 4 } = 16 x ^ { 2 }$

Multiple Choice

Find all real solutions of the equation. $x ^ { 4 } = 16 x ^ { 2 }$

A) x = 0, x = 4, x = -4
B) x = 0
C) x = 0, x = 16, x = -16
D) x = 0, x = 16
E) none of these