Simplify the Cube Root $\sqrt [ 3 ] { - 27 a ^ { 3 } }$

Simplify the cube root. $\sqrt [ 3 ] { - 27 a ^ { 3 } }$

A) -3a
B) $- 3 a ^ { 3 }$
C) -6a
D) 3|a|
E) 6|a|