In $\triangle ABC$, with usual notations, if $\cos A = \frac{1}{2}$, $a = 3$, and $\angle B = \frac{\pi}{6}$, then the values of $b$ and $c$ are:

  • A
    $b = \sqrt{3}, c = \sqrt{3}$
  • B
    $b = 2\sqrt{3}, c = \sqrt{3}$
  • C
    $b = \sqrt{3}, c = 2\sqrt{3}$
  • D
    $b = \sqrt{3}, c = \frac{1}{\sqrt{3}}$

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