Evaluate the Integral $$\int 9 \sec ^ { 4 } x d x$$

Multiple Choice

Evaluate the integral.
- $$\int 9 \sec ^ { 4 } x d x$$

A) $3 \tan ^ { 3 } x + C$
B) $- 3 \tan ^ { 3 } x + C$
C) $9 ( \sec x + \tan x ) ^ { 5 } + C$
D) $9 \tan x + 3 \tan ^ { 3 } x + C$