A student determines that a rock has a mass of $65\,\text{g}$. She pours $30\,\text{cm}^3$ of water into a measuring cylinder. She then lowers the rock into the water until it is fully covered. The water level increases to $55\,\text{cm}^3$. What is the density of the rock?
- A$0.38\,\text{g cm}^{-3}$
- B$1.2\,\text{g cm}^{-3}$
- C$2.2\,\text{g cm}^{-3}$
- D$2.6\,\text{g cm}^{-3}$