Considering Only the Probability Factor in the Gas-Phase Reaction C

Considering only the probability factor in the gas-phase reaction C 2 A + B, ____ side is favored because ____.

A) the product; there are more possible arrangements of molecules on the reactant side
B) the product; there are more possible arrangements of molecules on the product side
C) the reactant; there are more possible arrangements of molecules on the reactant side
D) the reactant; there are more possible arrangements of molecules on the product side
E) one cannot say which; more information is needed.