Use Algebraic Procedures to Find the Exact Solution(s) of the Equation

Multiple Choice

Use algebraic procedures to find the exact solution(s) of the equation below. $6 ^ { 9 x + 2 } = \frac { 1 } { 216 }$

A) $x = - \frac { 5 } { 9 }$
B) $x = \frac { 1 } { 9 }$
C) $x = \frac { 1 } { 6 }$
D) $x = - \frac { 5 } { 6 }$
E) $x = \frac { 5 } { 6 }$