单项选择题
You develop a Web application that contains two master pages.
You need to dynamically set the master page when a user views pages in the application.
What should you do?（）
A.SetPage.MasterPageFile in the Page’sPage_Initevent.
B.SetPage.MasterPageFile in the Page’sOnInit event.
C.SetPage.MasterPageFile in the Page’sPage_Loadevent.
D.SetPage.MasterPageFile in the Page’sPage_PreInitevent.
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