You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5.  You derive a new validation control from the BaseValidator class.  The validation logic for the control is implemented in the Validate method in the following manner. Protected Overloads Function Validate( _  ByVal value As String) As Boolean  ...  End Function  You need to override the method that validates the value of the related control.  Which override method should you use?（） 

• A、
• B、
• C、
• D、