Which of the Following Gas-Phase Reactions Is a Possible Chain-Terminating $\to$

Multiple Choice

Which of the following gas-phase reactions is a possible chain-terminating step in the light-initiated chlorination of methane?

A) Cl-Cl $\to$ 2Cl·
B) Cl· + CH₄ $\to$ CH₃· + H-Cl
C) CH₃· + CH₃· $\to$ CH₃-CH₃
D) CH₃· + Cl-Cl $\to$ CH₃Cl + Cl·
E) More than one of these choices.