If Chemical Reactions Will Eventually Reach an Equilibrium State, What

Multiple Choice

If chemical reactions will eventually reach an equilibrium state, what is the purpose of enzymes in a biological system?

A) Enzymes are consumed to speed up chemical reactions.
B) Enzymes speed up chemical reactions without being used up in the process.
C) Enzymes slow down chemical reactions.
D) Enzymes alter the equilibrium state between reactants and products.
E) Enzymes prevent the formation of unstable reaction intermediates.