Let $f(x) = \frac{2 - \sqrt{x + 4}}{\sin 2x}$,$x \neq 0$. In order for $f(x)$ to be continuous at $x = 0$,$f(0)$ must be defined as:

  • A
    $\frac{-1}{8}$
  • B
    $\frac{1}{2}$
  • C
    $1$
  • D
    $\frac{1}{8}$

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