Which of the following statements about enzyme function is correct?

• A. Enzymes can greatly speed up reactions, but they cannot change the net energy output because they cannot change the activation energy.
• B. Enzymes can change the equilibrium point of reactions, but they cannot speed up reactions because they cannot change the net energy output.
• C. Enzymes can greatly speed up reactions, but they cannot change the activation energy because they cannot change the net energy output.
• D. None of the listed responses is correct.
• E. Enzymes can lower the activation energy of reactions, but they cannot change the equilibrium point because they cannot change the net energy output.