When Does Feedback Inhibition of an Enzyme Occur

When does feedback inhibition of an enzyme occur?

A) If an end product of the pathway binds to the allosteric site of the enzyme.
B) If a competitive inhibitor binds to the active site of the enzyme.
C) If the coenzyme fails to bind to the active site of the enzyme.
D) If an end product of the pathway binds to the active site of the enzyme.
E) If a noncompetitive inhibitor binds to the active site of the enzyme.