The equation for the reaction of aluminium with iron(III) oxide is given. $2\mathrm{Al} + \mathrm{Fe_2O_3} \rightarrow \mathrm{Al_2O_3} + 2\mathrm{Fe}$. Which statement about this reaction is correct?
- AThe aluminium acts as an oxidising agent.
- BIt shows that iron is more reactive than aluminium.
- CThe oxidation number of the aluminium decreases during the reaction.
- DIt shows that aluminium has a greater tendency to form ions than iron.