Which Sentence Best Describes the Process of Competitive Inhibition

Which sentence best describes the process of competitive inhibition?

A) The inhibitor binds to and directly blocks the active site of the enzyme.
B) The products of the reaction block the active site of the enzyme.
C) The substrate and cofactors compete for the active site.
D) The inhibitor binds to a site other than the active site of the enzyme and blocks enzyme activity indirectly.