The angular speed of a wheel increases from $600 \, rpm$ to $1200 \, rpm$ in $10 \, s$. What is the angular acceleration?
- A$600 \, rad \, s^{-2}$
- B$60\pi \, rad \, s^{-2}$
- C$60 \, rad \, s^{-2}$
- D$2\pi \, rad \, s^{-2}$
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