Proper Separation of Duties Is Useful to Prevent Various Types

Proper separation of duties is useful to prevent various types of misstatements. Which one of the following is NOT an essential separation of duties?

A) Separate the credit- granting function from the sales function.
B) Anyone responsible for inputting sales and cash receipts transactions information into the computer should be denied access to cash.
C) Persons having access to cash should not have access to marketable securities.
D) Personnel doing internal comparisons should be independent of those entering the original data.