9. Which statement correctly describes the effects of competitive, noncompetitive, and uncompetitive enzyme inhibitors on kinetic parameters?

(A) Competitive inhibitors decrease Vmax but do not affect Km.

(B) Noncompetitive inhibitors increase Km but do not change Vmax.

(C) Uncompetitive inhibitors decrease both Vmax and Km.

(D) Competitive inhibitors decrease both Vmax and Km.

(E) Uncompetitive inhibitors increase Vmax by stabilizing the enzyme-substrate complex.