If $f(a) = 2, f'(a) = 1, g(a) = -1, g'(a) = 2$,then the value of $\lim_{x \to a} \frac{g(x)f(a) - g(a)f(x)}{x - a}$ is:

  • A
    $-5$
  • B
    $1/5$
  • C
    $5$
  • D
    none

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