Seleect the acid-base reaction.

A. Ca(OH)₂ → CaO + H₂O
B. Zn + HCl → ZnCl₂ + H₂
C. 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
D. H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O