A technician is investigating the cause of a Windows 7 PC running very slow. While reviewing Task Manager, the technician finds one process is using more than 90% of the CPU. Outbound network traffic on port 25 is very high, while inbound network traffic is low. Which of the following tasks should be done FIRST? 

Answer options:

A. Disconnect the network cable.
B. Update the antivirus software.
C. Run an antivirus scan.
D. Shut down the PC.

A