Complete the Identity $$\csc ^ { 2 } \frac { \theta } { 2 } = ?$$

Multiple Choice

Complete the identity.
- $$\csc ^ { 2 } \frac { \theta } { 2 } = ?$$

A) $\frac { 2 } { 1 - \cos \theta }$

B) $\frac { 1 - \sec \theta } { 2 }$

C) $\frac { 2 } { 1 + \sin \theta }$

D) $\frac { 1 + \sec \theta } { 2 }$