You have a file server named Server1 that runs Windows Server 2003 Service Pack 2 (SP2). Server1 has one basic disk that contains one partition. You monitor the PhysicalDisk : Avg. Disk Bytes/Read counter for one year and discover that the value has decreased by 25 percent. You need to increase the disk performance of Server1. What should you do? （）

• A、Compress the volume.
• B、Defragment the volume.
• C、Convert the disk to a dynamic disk.
• D、Enable Shadow Copies on the volume.