If the function $f(x) = 2x^3 - 9ax^2 + 12a^2x + 1$,where $a > 0$,attains its maximum and minimum values at $p$ and $q$ respectively,such that $p^2 = q$,then what is the value of $a$?

  • A
    $1/2$
  • B
    $3$
  • C
    $1$
  • D
    $2$

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