A technician is using the troubleshooting theory to help resolve a problem that is occurring with a client's machine. The technician has verified system functionally. Which of the following is the…

Identifying the problem is step 1 of the methodology, which has already been completed in earlier stages before verification occurred.

Establishing a plan of action is step 4 and must precede implementing and verifying the fix, so it cannot follow verification.

Testing the theory to determine cause is step 3 and occurs before a plan of action is established and the solution implemented.

CompTIA's A+ troubleshooting theory defines six ordered steps: identify the problem, establish a theory of probable cause, test the theory, establish a plan of action and implement the solution, verify full system functionality and implement preventive measures, and finally document findings, actions, and outcomes. Since the technician has already verified system functionality (step 5), the only remaining step is documentation (step 6). Documentation ensures a knowledge base for future issues and closes the troubleshooting process properly.