You need to configure the servers to meet the following requirements:

You have 10 servers that run Windows Server 2008 R2. The servers have the Web Server (IIS) server role installed.
The servers are members of a Web server farm. The servers host the same Web site.

You need to configure the servers to meet the following requirements:

* Allow changes to the Web server configurations that are made on one server to be made on all servers in the farm.
* Minimize administrative effort to perform the configuration changes.

What should you do?

A.
On all servers, configure the Shared Configuration settings.

B.
On one server, configure the Shared Configuration setting.

C.
On one server, create a scheduled task that copies the Intepub folder to the other servers.

D.
Create a DFS Namespace. On each server configure the Inetpub folder as the target of the DFS Namespace.

Explanation:
To configure settings to use shared configuration files and encryption keys
1. Open IIS Manager and click the server node. For information about opening IIS Manager, see Open IIS Manager (IIS 7).
2. In Features View, double-click Management Service.
3. On the Management Service page, in the Actions pane, click Stop.
4. In the toolbar, click the back button.
5. In Features View, double-click Shared Configuration.
6. Select Enable shared configuration to enable the Shared Configuration feature.
7. Under Configuration Location, in the Physical path box, type the physical path or click the browse button (…) to locate the physical path of the configuration directory.
8. In the User name box, type a user name of an account that has access to the configuration directory. Then in the Password and Confirm Password boxes, type the password associated with this user account.
9. In the Actions pane, click Apply.
10. In the Encryption Keys Password dialog box, in the Enter encryption key password box, type the password that is used to access the encryption keys in the configuration directory. Then click OK.
Note This is the password that was specified when the configuration files and encryption keys were exported.
11. Close IIS Manager and then reopen it. In the Connections pane, click the server node.
12. In Features View, double-click Management Service.
13. On the Management Service page, in the Actions pane, click Start

Source: http://technet.microsoft.com/en-us/library/cc771871(WS.10).aspx