Which tool should you use?

Your network contains a Web server that runs Windows Server 2008 R2.

You need to back up all Web site content.

Which tool should you use?

A.
Appcmd

B.
Internet Information Services (IIS) Manager

C.
Internet Information Services (IIS) 6.0 Manager

D.
Wbadmin

Explanation:
Wbadmin
Backups are usally done with Windows Server Backup;

Wbadmin is the command-line counterpart to Windows Server Backup. You use Wbadmin to manage all aspects of backup configuration that you would otherwise manage in Windows Server Backup. This means that you can typically use either tool to manage backup and recovery.

Source: http://technet.microsoft.com/en-us/magazine/dd767786.aspx

To not only backup the website content but also the IIS configuration backup the systemstate:
The -systemState parameter:
For Windows7 and Windows Server 2008 R2, creates a backup that includes the system state in addition to any other items that you specified with the -include parameter. The system state contains boot files (Boot.ini, NDTLDR, NTDetect.com), the Windows Registry including COM settings, the SYSVOL (Group Policies and Logon Scripts), the Active Directory and NTDS.DIT on Domain Controllers and, if the certificates service is installed, the Certificate Store. If your server has the Web server role installed, the IIS Metadirectory will be included. If the server is part of a cluster, Cluster Service information will also be included.

Source: http://technet.microsoft.com/en-us/library/cc742083(WS.10).aspx

Appcmd
The backup feature of Appcmd only backups the configuration of the IIS server, not the websites:
After you install IIS 7.0, you can backup your configuration by using the built-in command-line tool, AppCmd.exe. You can run AppCmd.exe to create a backup of your Web server before you have changed any configuration.
Files configuration IIS server:
Administration.config
ApplicationHost.config
Redirection.config
MBSchema.xml
MetaBase.xml

To create a backup using AppCmd.exe
1. Open a command prompt as administrator and change to the %windir%\system32\inetsrv\ directory.
2. At the command prompt, type appcmd add backup “FirstBackup” and then press Enter.
3. This creates a backup with the name “FirstBackup”. At a later date, if you need to restore the backup, use appcmd restore backup “FirstBackup”

Source: http://learn.iis.net/page.aspx/199/create-a-backup-with-appcmd/