Segregation of duties is a concept that applies to both accounting transaction and system duties. Which of the following is NOT a violation of segregation of system responsibilities.?

The system administrator can also be the security manger to ensure operations run smoothly

Allowing the programmer to use and input actual data to test a program to make sure they have an accurate picture of the type of data being entered into the system

The information system librarian has sole custody over company's database

Allowing the computer operator to input payroll data in a company with less than $10$ employees