问题：

[多选]

You are the network administrator for ExamSheet. 
You plan to upgrade 550 computers from Windows 95 to Windows 2000 Professional. You create an Unattend.txt file by using Setup Manager. You copy the file to the network share that will be used to install Windows 2000 Professional. You start the installation on a test computer by using a network shared folder and an answer file. When the installation is complete， you realize that the upgraded computers are not utilizing their entire hard disks. 
You want to ensure that the unattended installation utilizes the entire hard drive on all computers. What should you do？ （）

A . Add an [Unattended] section to Unattend.txt， and set theFileSystemparameter toConvertNTFS. 
B . Rename Unattend.txt to Cmdlines.txt and copy it to the \$OEM$ subdirectory.
C . Add a [GUIRunOnce] section to answer file， and add an entry for the Unattend.txt file.
D . Create a \$OEM$\S$ folder on the hard disk of the test computer， and copy Unattend.txt to thefolder.
E . Add an [Unattended] section to Unattend.txt， and set theExtendOEMPartitionto1.
F . Add an [Unattended] section to Unattend.txt， and set theExtendOEMPartitionparameter to999.