An Example of a Reaction Having an E_act = 0 $\rightarrow$

An example of a reaction having an E_act = 0 would be:

A) Br· + Br-Br -- $\rightarrow$ Br-Br + Br·
B) F· + CH₄ -- $\rightarrow$ H-F + CH₃·
C) CH₃· + Cl· -- $\rightarrow$ CH₃Cl
D) More than one of these
E) None of these