Explanation
According to the CompTIA troubleshooting methodology, the fourth step is to establish a plan of action to resolve the problem and implement the solution1. The best practice is to test each solution individually to determine the root cause, rolling back the changes in between each test. This way, the technician can isolate the cause and avoid introducing new problems or making the situation worse. Testing each solution in succession and restoring the server from the latest snapshot (D) is not a good option because it may not identify the root cause and may overwrite important data. Implementing the shortest solution first to identify the issue and minimize downtime is also not a good option because it may not solve the problem or may create new issues. Consulting internet forums to determine which is the most common cause and deploy only that solution (A) is not a good option because it may not apply to the specific situation or may be outdated or inaccurate