The radius of a circular plate is increasing at the rate of $0.01 \text{ cm/sec}$. When the radius is $12 \text{ cm}$,the rate at which the area increases is:
- A$0.6 \pi \text{ cm}^2/\text{sec}$
- B$0.24 \pi \text{ cm}^2/\text{sec}$
- C$1.2 \pi \text{ cm}^2/\text{sec}$
- D$2.4 \pi \text{ cm}^2/\text{sec}$
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