In the van der Waals equation $\left( P + \frac{a}{V^2} \right)(V - b) = RT$,what do $a$ and $b$ represent?

  • A
    $a$ and $b$ both represent volume correction.
  • B
    $a$ and $b$ both represent the force of attraction between molecules.
  • C
    $a$ represents the force of attraction between molecules and $b$ represents volume correction.
  • D
    $a$ represents volume correction and $b$ represents the intermolecular force of attraction.

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