What Is Not a Good Laboratory Method for the Preparation

Multiple Choice

What is not a good laboratory method for the preparation of oxygen?

A) photosynthesis of sugars: 6 CO₂(g) + 6 H₂O(l) → 6 O₂(g) + ₆H₁₂O₆(s)
B) electrolysis of water: 2 H₂O(l) → 2 H₂(g) + O₂(g)
C) catalytic decomposition of hydrogen peroxide: 2 H₂O₂(aq) → 2 H₂O(l) + O₂(g)
D) thermal decomposition of potassium chlorate: 2 KClO₃(s) → 2 KCl(s) + 3 O₂(g)