Which equation shows the initiation step in the substitution reaction of methane with chlorine?
- A$\text{CH}_4 \rightarrow \cdot\text{CH}_3 + \cdot\text{H}$
- B$\text{CH}_4 \rightarrow \cdot\text{CH}_3 + \text{H}^+$
- C$\text{Cl}_2 \rightarrow 2\cdot\text{Cl}$
- D$\text{Cl}_2 \rightarrow \text{Cl}^+ + \text{Cl}^-$