You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. You create a custom control named OrderForm. You write the following code segment：   public delegate void CheckOrderFormEventHandler（EventArgs e）； private static readonly object CheckOrderFormKey = new object（）；   public event CheckOrderFormEventHandler CheckOrderForm   {   add { Events.AddHandler（CheckOrderFormKey， value）； }  remove { Events.RemoveHandler（CheckOrderFormKey， value）； }  }    You need to provide a method that enables the OrderForm control to raise the CheckOrderForm event.  Which code segment should you use？（）

• A、A
• B、B
• C、C
• D、D