What should you configure for each Web site?

Your network contains a Web server that runs Windows Server 2008 R2.
The server has two Web sites named Site1 and Site2.
Site1 is accessed by using the name site1.contoso.com.
Site2 is accessed by using the name site2.contoso.com.
You plan to configure both Web sites to use SSL encryption.
You need to ensure that users can access Site1 by using the URL https://site1.contoso.com and Site2 by using the URL https://site2.contoso.com.
What should you configure for each Web site?

A.
a different application pool

B.
a different host header site binding

C.
a different IP address site binding

D.
a different port site binding