Evaluate the Expression $$\left( - \frac { 27 } { 64 } \right) ^ { - 2 / 3 }$$

Multiple Choice

Evaluate the expression.
- $$\left( - \frac { 27 } { 64 } \right) ^ { - 2 / 3 }$$

A) $- \frac { 9 } { 16 }$

B) $\frac { 9 } { 16 }$

C) $\frac { 16 } { 9 }$

D) not a real number