What Is the Balanced Oxidation Half-Reaction for the Following Reaction

Multiple Choice

What is the balanced oxidation half-reaction for the following reaction?
Cu²⁺(aq) + Fe(s) → Cu(s) + Fe²⁺(aq)

A) Cu(s) + 2e^- → Cu(s)
B) Cu²⁺(aq) + 2e^- → Cu(s)
C) Fe²⁺(aq) + 2e^- → Fe(s)
D) Cu(s) → Cu²⁺(aq) + 2e^-
E) Fe(s) → Fe²⁺(aq) + 2e^-