Express Using Positive Exponents $\left( \frac { 2 } { 5 } \right) ^ { - 2 }$

Multiple Choice

Express using positive exponents. Then simplify.
- $\left( \frac { 2 } { 5 } \right) ^ { - 2 }$

A) $\frac { 4 } { 25 }$
B) $\frac { 25 } { 4 }$
C) $- \frac { 25 } { 4 }$
D) $- \frac { 4 } { 25 }$