Determine the Answer That Establishes an Identity $\frac { \sin \theta } { \csc \theta } + \frac { \cos \theta } { \sec \theta } = ?$

Multiple Choice

Determine the answer that establishes an identity. $\frac { \sin \theta } { \csc \theta } + \frac { \cos \theta } { \sec \theta } = ?$

A) $\csc ^ { 2 } \theta$
B) $\cos ^ { 2 } \theta$
C) $\sec ^ { 2 } \theta$
D) $1$
E) $\sin ^ { 2 } \theta$