You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. You create a custom Web user control named SharedControl. The control will be compiled as a library. You write the following code segment for the SharedControl control. （Line numbers are included for reference only.） 01 Protected Overloads Overrides Sub OnInit（ByVal e As EventArgs） 02 MyBase.OnInit（e） 03 04 End Sub All the master pages in the ASP.NET application contain the following directive. You need to ensure that the state of the SharedControl control can persist on the pages that reference a master page. Which code segment should you insert at line 03？（）

A. Page.RegisterRequiresPostBack（Me）
B. Page.RegisterRequiresControlState（Me）
C. Page.UnregisterRequiresControlState（Me）
D. Page.RegisterStartupScript（"SharedControl"， "server"）