On the diagram, curve $X$ was produced by monitoring the decomposition of $100\,\text{cm}^3$ of $1.0\,\text{mol dm}^{-3}$ hydrogen peroxide, with manganese(IV) oxide as the catalyst. Which change to the original experimental conditions would give curve $Y$?
- Aadding more manganese(IV) oxide
- Badding some $0.1\,\text{mol dm}^{-3}$ hydrogen peroxide
- Cadding water
- Draising the temperature