In the chloride process used to manufacture titanium, the initial stage involves this reaction. $2\text{TiO}_2 + 4\text{Cl}_2 + 3\text{C} \rightarrow 2\text{TiCl}_4 + 2\text{CO} + \text{CO}_2$ What substance is reduced in this reaction?
- Acarbon
- Bchlorine
- Coxygen
- Dtitanium