Simplify $- \sqrt [ 3 ] { - 125 x ^ { 9 } }$

Multiple Choice

Simplify: $- \sqrt [ 3 ] { - 125 x ^ { 9 } }$

A) $- 4 x ^ { 3 }$
B) $- 5 x ^ { 3 }$
C) $5 x ^ { 3 }$
D) not a real number