If $f(x) = \cos^{-1} x$,$g(x) = e^x$,and $h(x) = g(f(x))$,then $\frac{h'(x)}{h(x)} = $

  • A
    $\frac{-1}{\sqrt{1-x^2}}$
  • B
    $\frac{-(e)^{\cos^{-1} x}}{\sqrt{1-x^2}}$
  • C
    $\frac{-1}{\sqrt{1-x^2}} e^x$
  • D
    $-\sqrt{1-x^2}$

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