Which DMV provides information about server-level wait statistics?

The correct choice provides insights into server-level wait statistics, which are crucial for diagnosing performance issues. The dynamic management view (DMV) in question, sys.dm_os_wait_stats, is specifically designed to gather and present data about the various wait types and their associated wait times on the SQL Server instance. This information can help database administrators understand where bottlenecks may exist in the query execution and helps in performance tuning.

The other DMVs listed do not focus on wait statistics. One focuses on current user sessions, another on active connections, and the last one on currently executing requests. While all are valuable for monitoring and diagnostics, only sys.dm_os_wait_stats directly provides the necessary information regarding wait statistics across the server level, making it the appropriate choice for the query regarding server-level wait statistics.