You have a call center that handles inquiries into billing issues for multiple medical facilities. You notice the call center agents often walk away from their workstations, leaving patient data visible for anyone to see. What can you do to prevent data theft within the call center? A. Encrypt the workstation hard drives. B. Lock the workstations after five minutes of inactivity. C. Install privacy screens. D. Log off the users when their workstations are not in use.