Which of the Following Is an Oxidation-Reduction Reaction

Multiple Choice

Which of the following is an oxidation-reduction reaction?

A) Cu (s) + 2AgNO₃ (aq) → 2Ag (s) + Cu(NO₃) ₂ (aq)
B) HCl (aq) + NaOH (aq) → H₂O (l) + NaCl (aq)
C) AgNO₃ (aq) + HCl (aq) → AgCl (s) + HNO₃ (aq)
D) Ba(C₂H₃O₂) ₂ (aq) + Na₂SO₄ (aq) → BaSO₄ (s) + 2NaC₂H₃O₂(aq)
E) H₂CO₃ (aq) + Ca(NO₃) ₂ (aq) → 2HNO₃ (aq) + CaCO₃ (s)