Evaluate the Integral $$\int 2 \sec ^ { 4 } x d x$$

Multiple Choice

Evaluate the integral.
- $$\int 2 \sec ^ { 4 } x d x$$

A) $2 \tan x + \frac { 2 } { 3 } \tan ^ { 3 } x + C$
B) $- \frac { 2 } { 3 } \tan ^ { 3 } x + C$
C) $2 ( \sec x + \tan x ) ^ { 5 } + C$
D) $\frac { 2 } { 3 } \tan ^ { 3 } x + C$