Simplify Assume That All Variables Represent Any Real Number $\sqrt [ 6 ] { x ^ { 6 } }$

Multiple Choice

Simplify. Assume that all variables represent any real number.
- $\sqrt [ 6 ] { x ^ { 6 } }$

A) $x$
B) $- x$
C) $| x |$
D) $- | x |$