Implement a secure site with ASP.NET

What are the primary differences between the AntiXSS Library and the default .NET Framework? (Choose all that apply)

The AntiXSS Library offers enhanced globalization capabilities.
The AntiXSS Library takes an accepted-list approach, whereas the .NET Framework takes a blocked-list approach.
The AntiXSS Library takes a blocked-list approach, whereas the .NET Framework takes an accepted-list approach.
The AntiXSS Library has be modified to realize performance gains.