Mark against the correct answer in each of the following:

Mark $(\sqrt{ })$ against the correct answer in each of the following:

$\int \sec x(\sec x+\tan x) d x=?$

A. $\tan x-\sec x+C$

B. $-\tan x+\sec x+C$

C. $\tan x+\sec x+C$

D. $-\tan x-\sec x+C$