If $a = i + j + k$,$b = 4i + 3j + 4k$,and $c = i + \alpha j + \beta k$ are coplanar vectors and $|c| = \sqrt{3}$,then:

  • A
    $\alpha = 1, \beta = -1$
  • B
    $\alpha = 1, \beta = \pm 1$
  • C
    $\alpha = -1, \beta = \pm 1$
  • D
    $\alpha = \pm 1, \beta = 1$

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