Your network consists of a single Active Directory domain named contoso.com.All servers run Windows Server 2003 Service Pack 2 (SP2).
You deploy a Web server named Server1. Users access the server by using the URL http://server1.contoso.com.
You need to create a new resource record that will allow users to access the server by using the URL http://www.contoso.com.The solution must prevent the need to modify the new record if the IP address of Server1 changes.
Which type of resource record should you configure?

A.
alias (CNAME)

B.
host (A)

C.
mail exchanger (MX)

D.
pointer (PTR)