A user is experiencing slow performance with their computer. A technician suspects the computer

has a virus and runs antivirus software. A virus is found and removed, but the performance issue
is not resolved. Which of the following should the technician perform NEXT?

A.
Document findings, actions, and outcomes

B.
Establish a plan of action to resolve the problem

C.
Re-establish a new theory or escalate

D.
Implement preventative measures