The first step of troubleshooting is always to identify the problem, which includes verifying the symptoms (incorrect time), asking the user clarifying questions, and checking system logs. Only after confirming the problem can the administrator proceed to form a theory and plan.
A). Plan of action is later.
B). Implement solution comes after testing a theory.
D). Test the theory requires a defined problem first.
References (CompTIA Network+ N10-009):
Domain: Network Troubleshooting - Troubleshooting methodology (Identify # Theory # Test # Plan # Implement # Verify # Document).