Evaluate, If Possible, the Given Trigonometric Function at the Indicated $$\sec t , t = \frac { 5 \pi } { 6 }$$

Multiple Choice

Evaluate, if possible, the given trigonometric function at the indicated value.
$$\sec t , t = \frac { 5 \pi } { 6 }$$

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