单项选择题

You have created an ASP.NET server control named Shopping Cart for use by other developers. Some developers report that the Shopping Cart control does not function properly with ViewState disabled. You want to ensure that all instances of the Shopping Cart control work even if View State is disabled. What should you do？（）

A.Require developers to set EnableViewStateMac to true.
B.Store state in ControlState instead of ViewState.
C.Serialize the state into an Application state entry called "MyControl".
D.Require developers to change the session state mode to SQLServer.

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单项选择题YouarecreatinganASP.NETWebsite.ThesitehasamasterpagenamedCustom.master.Thecode-behindfileforCustom.mastercontainsthefollowingcodesegment.PartialPublicClassCustomInheritsSystem.Web.UI.MasterPagePublicPropertyRegionAsStringProtectedSubPage_Load（ByValsenderAsObject，ByValeAsSystem.EventArgs）HandlesMe.LoadEndSubEndClassYoucreateanewASP.NETpageandspecifyCustom.masterasitsmasterpage.YouaddaLabelcontrolnamedlblRegiontothenewpage.YouneedtodisplaythevalueofthemasterpagesRegionpropertyinlblRegion.Whatshouldyoudo？（）

A.Add the following code segment to the Page_Load method of the page code-behind file. Dim custom As Custom = Me.Parent lblRegion.Text = custom.Region
B.Add the following code segment to the Page_Load method of the page code-behind file. Dim custom As Custom = Me.Master lblRegion.Text = custom.Region
C.Add the following code segment to the Page_Load method of the Custom.Master.vb code-behind file. Dim lblRegion As Label = Page.FindControl（"lblRegion"） lblRegion.Text = Me.Region
D.Add the following code segment to the Page_Load method of the Custom.Master.vb code-behind file. Dim lblRegion As Label = Master.FindControl（"lblRegion"） lblRegion.Text = Me.Region