A company has added several new employees, which has caused the network traffic to increase by 200%. The network traffic increase from the new employees
was only expected to be 20% to 30%. The administration suspects that the network may have been compromised. Which of the following should the network
administrator have done previously to minimize the possibility of a network breach?

A.
Create VLANs to segment the network traffic

B.
Place a network sniffer on segments with new employees

C.
Provide end user awareness and training for employees

D.
Ensure best practices were implemented when creating new user accounts