A student intends to investigate how the reaction rate changes when hydrochloric acid reacts with calcium carbonate. $\text{CaCO}_3(\text{s}) + 2\text{HCl}(\text{aq}) \rightarrow \text{CaCl}_2(\text{aq}) + \text{H}_2\text{O}(\text{l}) + \text{CO}_2(\text{g})$ Three methods are given. Which of these methods could be used to find out how the rate of reaction changes?
- A1, 2 and 3
- B1 and 2 only
- C1 and 3 only
- D2 and 3 only