Simplify the Expression $$- \sqrt [ 3 ] { - 8 x ^ { 3 } }$$

Multiple Choice

Simplify the expression. Assume all variables represent positive real numbers.
- $$- \sqrt [ 3 ] { - 8 x ^ { 3 } }$$

A) not a real number
B) $2 x ^ { 3 }$
C) $2 x$
D) $- 2 x$