If $\tan x + \tan \left( {\frac{\pi }{3} + x} \right) + \tan \left( {\frac{{2\pi }}{3} + x} \right) = 3,$ then

  • A

    $\tan x = 1$

  • B

    $\tan 2x = 1$

  • C

    $\tan 3x = 1$

  • D

    None of these

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