If $A = \begin{bmatrix} 0 & 2 \\ 3 & -4 \end{bmatrix}$ and $hA = \begin{bmatrix} 0 & 3a \\ 2b & 24 \end{bmatrix}$, then the values of $h, a, b$ are respectively
- A$-6, -12, -18$
- B$-6, 4, 9$
- C$-6, -4, -9$
- D$-6, 12, 18$
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