During the DMO procedure, which feature assists in troubleshooting?

The correct choice is the Log Viewer, as it plays a crucial role in troubleshooting during the Database Migration Option (DMO) procedure. The Log Viewer provides detailed logs of the migration process, including any errors or warnings that may arise. This enables administrators to quickly identify and analyze issues, allowing for more efficient problem resolution. By reviewing the logs, users can pinpoint the exact stages where failures or anomalies occurred, thereby facilitating a more targeted approach to troubleshooting.

The other options have their own specific functions, but they do not primarily focus on logging as a means of troubleshooting within the context of the DMO procedure. For instance, while the Performance Analyzer is useful for assessing system performance, it does not provide the detailed error context that the Log Viewer does. Similarly, the Trace Analyzer is intended for monitoring and diagnosing issues with SQL queries and performance, but again, it does not focus on the migration logs. The Connection Monitor helps in checking the status of connections but lacks the detailed troubleshooting capabilities that logs provide during migration.