Simplify the Expression $$( - 2 x ) ^ { 3 }$$

Multiple Choice

Simplify the expression. Assume all variables represent nonzero real numbers.
- $$( - 2 x ) ^ { 3 }$$

A) $- 8 x ^ { 3 }$
B) $8 x$
C) $- 6 x$
D) $6 \mathrm { x } ^ { 3 }$