Perform the Operation and Give the Answer as a Fraction $\left( \frac { 1 } { 25 } \right) - \left( - \frac { 1 } { 20 } \right)$

Multiple Choice

Perform the operation and give the answer as a fraction in lowest terms.
- $\left( \frac { 1 } { 25 } \right) - \left( - \frac { 1 } { 20 } \right)$

A) $\frac { 9 } { 5 }$
B) $\frac { 100 } { 9 }$
C) $\frac { 9 } { 100 }$
D) $\frac { 1 } { 250 }$