You are designing an authentication plan for a SharePoint 2010 intranet site for a large
enterprise. The site administrator and the Active Directory (AD) administrator are concerned
that the traffic on the SharePoint site might cause performance issues related to site
authentication. Average user page sessions typically last longer than 15 minutes. You must
design an authentication plan that provides the best possible performance and meets the

following requirements: ·The plan must be able to accommodate 50,000 users. .The existing
infrastructure must be used as much as possible but the performance problem with user
access must be prevented. Which approach should you recommend?

A.
Design a SharePoint 2010 site that requires Windows NTLM authentication to log on.

B.
Design a site that requires basic authentication to log on.

C.
Design a site that requires forms-based authentication to log on.

D.
Design a SharePoint 2010 site that requires Windows Kerberos authentication to log on.