Choose the One Alternative That Best Completes the Statement or Answers

Multiple Choice

Choose the one alternative that best completes the statement or answers the question.
Use the even-odd properties to find the exact value of the expression. Do not use a calculator.
- $\sin \left( - 120 ^ { \circ } \right)$

A) $- \frac { \sqrt { 3 } } { 2 }$
B) $\frac { - 1 } { 2 }$
C) $\frac { \sqrt { 3 } } { 2 }$
D) $\frac { 1 } { 2 }$