Joe, a technician at the local power plant, notices that several turbines had ramp up in cycles
during the week. Further investigation by the system engineering team determined that a timed
.exe file had been uploaded to the system control console during a visit by international
contractors. Which of the following actions should Joe recommend?

A.
Create a VLAN for the SCADA

B.
Enable PKI for the MainFrame

C.
Implement patch management

D.
Implement stronger WPA2 Wireless