In the Reaction CuO(s)+ CO₂(g)→ CuCO₃(s)

In the reaction
CuO(s) + CO₂(g) → CuCO₃(s) ,

A) O^2- acts as a Lewis base and CO₂ acts as a Lewis acid.
B) O^2- acts as a Lewis base and Cu²⁺ acts as a Lewis acid.
C) CuO is the Lewis acid and CuCO₃ is its conjugate base.
D) CO₂ is the Lewis acid and CuCO₃ is its conjugate base.
E) Cu²⁺ acts as a Lewis acid and CO₃^2- acts as a Lewis base.