If $f(x)=x^3-10x^2+200x-10$,then

  • A
    $f(x)$ is decreasing in $(-\infty, 10]$ and increasing in $[10, \infty)$
  • B
    $f(x)$ is increasing in $(-\infty, 10]$ and decreasing in $[10, \infty)$
  • C
    $f(x)$ is increasing throughout the real line
  • D
    $f(x)$ is decreasing throughout the real line

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