Write $\left( \cos ^ { 2 } x \right) \left( 1 + \tan ^ { 2 } x \right)$

Multiple Choice

Write $\left( \cos ^ { 2 } x \right) \left( 1 + \tan ^ { 2 } x \right)$ in terms of $\sin x$
And $\cos x$
Then simplify

A) $1$
B) $\sin ^ { 2 } x$
C) $\sin x$
D) $\cos x$
E) $- \cos ^ { 2 } x$