Identify which of the following statements are incorrect. If the statement is incorrect, rewrite it to be correct.
(a) Reactions are faster at a higher temperature because activation energies are lower.
(b) Rates increase with increasing concentration of reactants because there are more collisions between reactant molecules.
(c) At higher temperatures, a larger fraction of molecules have enough energy to get over the activation energy barrier.
(d) Catalyzed and uncatalyzed reactions have identical mechanisms.