You have a computer that runs Windows XP. The computer has one basic disk that contains a single partition. The partition has 30 GB of free space. The hard disk has 5 GB of unallocated space. You need toinstall Windows 7 in a dual-boot configuration. Windows 7 must not be installed in a virtual hard disk (VHD). What should you do first?（）

• A、Create a second partition.
• B、Shrink the primary partition.
• C、Convert the hard disk to a GPT disk.
• D、Convert the hard disk to a dynamic disk.