You need to configure the Project Server environment to allow alternative authentication

You install a Microsoft Office Project Server 2007 environment. You configure Active Directory authentication. You need to configure the Project Server environment to allow alternative authentication. What should you do first?

A.
Create a new instance of Project Server.

B.
Create a new Shared Services Provider.

C.
Extend the Web application that hosts Project Web Access (PWA).

D.
Create a new site collection.