Complete the Identity $\sec x - \frac { 1 } { \sec x } = ?$

Multiple Choice

Complete the identity.
- $\sec x - \frac { 1 } { \sec x } = ?$

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