Evaluate, If Possible, the Given Trigonometric Function at the Indicated $\sin t , t = \frac { 4 \pi } { 3 }$

Multiple Choice

Evaluate, if possible, the given trigonometric function at the indicated value.
$\sin t , t = \frac { 4 \pi } { 3 }$

A) $- \frac { \sqrt { 3 } } { 2 }$
B) $- \frac { 1 } { 2 }$
C) $- \frac { 2 \sqrt { 3 } } { 3 }$
D) $\frac { \sqrt { 3 } } { 2 }$
E) not possible