Limestone is used to cut sulfur dioxide emissions from coal-fired power stations. The reaction is given by: $\text{CaCO}_3 + \text{SO}_2 \rightarrow \text{CaSO}_3 + \text{CO}_2$. What is the minimum mass of $\text{CaCO}_3$ needed to remove $1$ tonne of $\text{SO}_2$?
- A1 tonne
- B2 tonnes
- C64 tonnes
- D100 tonnes