Complete the Identity $\frac { \cot \alpha + \csc \alpha } { \sin \alpha + \tan \alpha }$

Complete the identity.
-The expression $\frac { \cot \alpha + \csc \alpha } { \sin \alpha + \tan \alpha }$
is to be the left hand side of an equation that is an identity. Which one of the following four expressions can be u: the right hand side of the equation to complete the identity?

A) $\cos \alpha \sin \alpha$
B) $\csc \alpha \cot \alpha$
C) $\sec \alpha \cot \alpha$
D) $\tan ^ { 2 } \alpha - 1$

Correct Answer:

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