When the Concentrations of Reactant Molecules Are Increased, the Rate

Multiple Choice

When the concentrations of reactant molecules are increased, the rate of reaction increases. The best explanation for this phenomenon is that as the reactant concentration increases,

A) the average kinetic energy of molecules increases.
B) the frequency of molecular collisions increases.
C) the rate constant increases.
D) the activation energy increases.
E) the order of reaction increases.