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