An allosteric inhibitor does which of the following? a. binds to an enzyme away from the active site and changes the conformation of the active site, increasing its affinity for substrate binding b. binds to an active site and blocks it from binding substrate c. binds to an enzyme away from the active site and changes the conformation of the active site, decreasing its affinity for the substrate d. binds directly to the active site and mimics the substrate