Which of the Following Is True About the Factors That

Which of the following is true about the factors that affect reaction rates?

A) The reaction rate usually decreases as the concentration of the reactants increases.
B) The reaction rate of virtually all reactions decreases with increasing temperature.
C) The number of collisions between reactants per unit time is substantially reduced relative to the homogeneous case.
D) Catalysts do not influence the reaction and keep the reaction rate constant.
E) The reaction rates of most reactions increase rapidly with increasing solvent viscosity.