If $f(x) = \sin(\sin x)$ and $f''(x) + \tan x f'(x) + g(x) = 0$,then $g(x)$ is

  • A
    $\cos^2 x \cos(\sin x)$
  • B
    $\sin^2 x \cos(\cos x)$
  • C
    $\sin^2 x \sin(\cos x)$
  • D
    $\cos^2 x \sin(\sin x)$

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