Perform the Indicated Operations and Simplify $\left( \frac { - 1 } { 2 } \right) + \left( \frac { 1 } { - 5 } \right)$

Multiple Choice

Perform the indicated operations and simplify. $\left( \frac { - 1 } { 2 } \right) + \left( \frac { 1 } { - 5 } \right)$

A) $- \frac { 9 } { 20 }$
B) $\frac { 4 } { 7 }$
C) $\frac { 4 } { 5 }$
D) $- \frac { 7 } { 10 }$
E) $\frac { 1 } { 10 }$