Simplify the Complex Number and Write It in Standard Form $\frac { 1 } { ( 6 i ) ^ { 3 } }$

Multiple Choice

Simplify the complex number and write it in standard form. $\frac { 1 } { ( 6 i ) ^ { 3 } }$

A) $\frac { 1 } { 6 } i$
B) $- \frac { 1 } { 216 } i$
C) $\frac { 1 } { 216 } i$
D) $- \frac { 1 } { 6 } i$
E) $216 i$