Select all of the examples that show a decomposition reaction.
A. CO₂ →C+0₂
B. Cu+O₂ → CuO₂
C. Na₂CO3 → Na₂O + CO₂
D. Zn+CuSO₁ → ZnSO4 + Cu
E. NaOH + HCl → NaCl + H₂O