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You manage a SQL Server 2014 instance that contains a database named DB1. Users report that some queries to DB1 take longer than expected. Although most queries run in less than one second, some queries take up to 20 seconds to run. You need to view all of the performance statistics for each database file. Which method should you use?
Correct Answer: C
Explanation/Reference: Explanation: sys.dm_io_virtual_file_stats Returns I/O statistics for data and log files.