In the Following Reactions, Which Species Is Oxidized?
Cu(s) $\rightarrow$

In the following reactions, which species is oxidized?
Cu(s) + FeSO₄(aq) $\rightarrow$ Fe(s) +CuSO₄(aq)

A) Cu
B) Fe
C) S
D) O
E) None, this is not a redox reaction.