Choice "C" is correct. An accountant's knowledge of an entity's business and its internal control influences the inquiries made and analytical procedures performed. A significant change in control activities would likely result in further inquiry of management.Choice "d" is incorrect. An accountant's knowledge of an entity's business and its internal control influences the inquiries made and analytical procedures performed. A significant change in control activities would likely result in the accountant employing analytical procedures with a more precise expectation, since more precise expectations are more effective at detecting misstatements.Choices "a" and "b" are incorrect. Only choice "C" is correct, as explained above.