Section: Information System Operations, Maintenance and Support

Explanation/Reference:
Explanation:
Time stamps are an effective control for detecting duplicate transactions such as payments made or received.

Section: Protection of Information Assets

Section: Protection of Information Assets
Explanation:
There is a probability that a terminated employee may misuse access rights; therefore, disabling the terminated employee's logical access is the most important action to take. All the work of the terminated employee needs to be handed over to a designated employee; however, this should be performed after implementing choice D. All the work of the terminated employee needs to be backed up and the employees need to be notified of the termination of the employee, but this should not precede the action in choice D.