You are designing an extranet site using SharePoint 2010. This site must allow employees
to log on to the extranet site from home. They should use their corporate Active Directory
credentials by typing their user name and password into text boxes on a logon page on the
site. After users log on, they should be redirected to the site home page. You need to meet
these requirements with the least amount of configuration. Which type of authentication
should you design?

A.
Kerberos

B.
NTLM

C.
forms-based authentication (FBA)

D.
Web Single-Sign On (SSO)