Simplify the Radical $\sqrt [ 4 ] { 256 }$ A)16
B)Not Real Number
C)6

Simplify the radical. Indicate if the radical is not a real number. Assume that x represents a positive real number.
- $\sqrt [ 4 ] { 256 }$

A) 16
B) Not real number
C) 6.233
D) 4