The minimum value of $f(a) = (2a^2 - 3) + 3(3 - a) + 4$ is

  • A
    $\frac{15}{2}$
  • B
    $\frac{11}{2}$
  • C
    $-\frac{13}{2}$
  • D
    $\frac{71}{8}$

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