$\int [1+2 \tan x(\tan x+\sec x)]^{\frac{1}{2}} dx = $

  • A
    $\log [\sec x(\sec x-\tan x)]+c$
  • B
    $\log [\operatorname{cosec} x(\sec x+\tan x)]+c$
  • C
    $\log [\sec x(\sec x+\tan x)]+c$
  • D
    $\log [\sec x+\tan x]+c$

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