If the function $f(x) = ax^3 + bx^2 + 11x - 6$, defined on $[1, 3]$, satisfies all the conditions of Rolle's theorem for $c = 2 + \frac{1}{\sqrt{3}}$, then

  • A
    $a = -1, b = 6$
  • B
    $a = 1, b = -6$
  • C
    $a = -1, b = -6$
  • D
    $a = 2, b = -1$

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