An iron nail is placed into aqueous copper(II) sulfate, and another iron nail is placed into aqueous magnesium sulfate. The outcomes are shown. Which statement is correct?
- ACopper atoms are oxidised more easily than magnesium atoms.
- BCopper atoms are reduced more easily than iron ions.
- CIron atoms are oxidised more easily than copper atoms.
- DIron atoms are reduced more easily than copper ions.