In the simple collision theory of chemical kinetics, the reaction rate increases as the concentration of reactant molecules increases because .A. the average kinetic energy of the molecules increases B. the rate constant increases C. the activation energy increases D. the frequency of molecular collisions increases E. the order of the reaction increases

Option D. the frequency of molecular collisions increases

Explanation:

Collision theory states that for a reaction to occur, the reactant particles must collide with the right orientation. With this knowledge, increasing the concentration of the reactants will increase the rate of the reaction as the reactant particles will collide frequently because the reactant particles are entirely every in the reaction vessel. This create room for easy collisions which in turn speed up the reaction rate.

i think   the answer is c hope i'm right