Your network contains two Web servers named Web1 and Web2. Web1 hosts the companys corporate Web site. Web2 is a test server that contains a copy of the Web site.Users connect to Web1 by using the URL http://www.contoso.com.A Web developer named User1 plans to test updates to the Web site on Web2.You need to ensure that User1 connects to Web2 by using the URL http://www.contoso.com. The solution must ensure that all other computers connect to Web1.What should you do？（）

A. From User1s computer, create a record in the Hosts file.
B. From User1s computer, create a record in the Lmhosts file.
C. From a DNS server, create a new Host (A) resource record.
D. From a DNS server, create a new Alias (CNAME) resource record.