Redox — practice question

This equation shows a redox reaction: $2\text{Al} + \text{Fe}_2\text{O}_3 \rightarrow 2\text{Fe} + \text{Al}_2\text{O}_3$. What is the change in the oxidation number of iron in this reaction?

• Afrom +2 to +3
• Bfrom +2 to 0
• Cfrom +3 to +2
• Dfrom +3 to 0