You have a computer that runs Windows 7. You have an application installation package named app1.msi.You need to perform a customized installation of app1.msi.  What should you do?（）

• A、Create a transform file named app1.mst and then run Msiexec.exe /i app1.msi /t app1.mst.
• B、Create a transform file named app1.mst and then run Msinfo32.exe /i app1.msi /t app1.mst.
• C、Create an update file named app1.msp and then run Msiexec.exe /i app1.msi /update app1.msp.
• D、Create an update file named app1.msp and then run Msinfo32.exe /i app1.msi /update app1.msp.