单项选择题

A.Page.RegisterRequiresPostBack(this); B.Page.RegisterR……

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：
01 protected override void OnInit（EventArgs e）
02 {
03 base.OnInit（e）；
04 ►
05 }
All the master pages in the ASP.NET application contain the following directive. <%@ Master Language="C#" EnableViewState="false" %>
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 04？（）

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

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