A catalyst. is used up during the reaction. changes the mechanism of the reaction, increasing the activation energy. changes the mechanism of the…

A catalyst…

A. is used up during the reaction.

B. changes the mechanism of the reaction, increasing the activation energy.

C. changes the mechanism of the reaction, lowering the activation energy.

D. does not take part in the reaction in any way.

E. provides energy to help the reactants achieve the required activation energy.