How Does a Catalyst Alter the Rate of a Reaction

How does a catalyst alter the rate of a reaction?

A) Catalysts replace part of the reactants
B) Catalysts provide the activation energy needed
C) A catalyst interferes with the attainment of chemical equilibrium
D) Catalysts provide more heat to the reaction, and the increased temperature leads to an increased reaction rate
E) Catalysts provide a reaction pathway with a lower energy of activation