These reaction types are given: 1 oxidation, 2 decomposition, 3 combustion, 4 reduction. The equation represents magnesium reacting with oxygen: $2\text{Mg} + \text{O}_2 \rightarrow 2\text{MgO}$. Which of these reaction types does magnesium undergo in this reaction?
- A1 and 3
- B1 only
- C2 and 4
- D4 only