Perform the Operation and Give the Answer as a Fraction $\left( - \frac { 20 } { 23 } \right) - \left( - \frac { 1 } { 3 } \right)$

Multiple Choice

Perform the operation and give the answer as a fraction in lowest terms.
- $\left( - \frac { 20 } { 23 } \right) - \left( - \frac { 1 } { 3 } \right)$

A) $- \frac { 37 } { 69 }$
B) $- \frac { 69 } { 37 }$
C) $- \frac { 5 } { 69 }$
D) $- \frac { 185 } { 23 }$