The action of many prescription drugs is to block the effects of enzymes by competitive inhibition. Explain what this means to your patient who is taking one of the drugs.

A)This drug helps by breaking down the enzyme.
B)This drug helps by blocking the binding of the substrate to the active site.
C)This drug helps by blocking the binding of the substrate by binding to the enzyme.
D)This drug helps by binding to the substrate instead of the enzyme.