Which of the following combinations of conditions may increase the rate of a chemical reaction?

• A.Decrease in temperature, increase in concentration of the reactants
• B.Increase in temperature, addition of a catalyst, decrease in the surface area of the reactants
• C.Increase in temperature, increase in concentration, addition of a catalyst and increase in the surface area of the reactants
• D.Decrease in temperature concentration and surface area of the reactants
• E.Additionof a catalyst and in the absence of light