Determine the Exact Value, If It Exists, Of $\sec ( - \pi )$

Multiple Choice

Determine the exact value, if it exists, of $\sec ( - \pi )$ .

A) $- \frac { \sqrt { 3 } } { 2 }$
B) $- 1$
C) $\frac { \sqrt { 3 } } { 2 }$
D) 1
E) The value does not exist.