An audit revealed that a privileged account accessed a large number of systems multiple times in a short period. The Account was promptly deactivated. The unexpected changes stopped happing, but some systems ceased to perform their schedule tasks. Which of the following was incorrectly performed?

A. Use and documentation of service accounts

B. Restriction of shared privileged accounts

C. Proper training prior to granting privileged accounts

D. Deployment of time-of-day restrictions