Simplify the Expression $\left( \frac { 1 } { 4 } \right) ^ { - 2 }$

Multiple Choice

Simplify the expression. Write the result using positive exponents only.
- $\left( \frac { 1 } { 4 } \right) ^ { - 2 }$

A) 16
B) $- 16$
C) $\frac { 1 } { 16 }$
D) $\frac { 1 } { 8 }$