In the diagram, curve X was produced by monitoring the decomposition of $100\ \text{cm}^3$ of $1.0\ \text{mol dm}^{-3}$ hydrogen peroxide, catalysed by manganese(IV) oxide. Which change to the original experimental conditions would produce curve Y?
- Aadding some $0.1\ \text{mol dm}^{-3}$ hydrogen peroxide
- Badding water
- Clowering the temperature
- Dusing less manganese(IV) oxide