Find the Exact Value of the Expression Below $\sin ^ { - 1 } \left[ \sin \left( \frac { 7 \pi } { 2 } \right) \right]$

Multiple Choice

Find the exact value of the expression below.
$\sin ^ { - 1 } \left[ \sin \left( \frac { 7 \pi } { 2 } \right) \right]$

A) $\frac { 7 \pi } { 2 }$
B) $- \pi$
C) $- \frac { \pi } { 2 }$
D) $\frac { \pi } { 2 }$
E) $- \frac { 7 \pi } { 2 }$