Statin Drugs Lower Cholesterol by Competitive Inhibition of the Cholesterol-Synthesizing

Statin drugs lower cholesterol by competitive inhibition of the cholesterol-synthesizing enzyme HMG-CoA reductase.A competitive inhibitor binds:

A) the enzyme at a site other than the active center,thereby decreasing the V_max of the reaction.
B) to the active center of the enzyme,with no effect on the V_max of the reaction.
C) to the entire enzyme-substrate complex,thereby decreasing the K_m.
D) to the active center of the enzyme,thereby causing the K_m to increase.