Find the Exact Value of the Expression $- \frac { 2 \sqrt { 3 } } { 3 }$

Multiple Choice

Find the exact value of the expression.
-cs

A) -2
B) 2
C) $- \frac { 2 \sqrt { 3 } } { 3 }$
D) $\frac { 2 \sqrt { 3 } } { 3 }$ c 330°