For what values of $x$ does the function $f(x) = (x - 1)^2 (x - 2)$ monotonically decrease?

  • A
    $x \in (1, 2)$
  • B
    $x \in (1, 5/3)$
  • C
    $x \in R - (1, 5/3)$
  • D
    None of these

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