Which feature should you modify to ensure that you can delegate permissions for the Default Web Site to User1?

Your network contains a Web server that runs Windows Server 2008 R2.
You create an IIS Manager user account for a user named User1.
When you attempt to delegate permissions for the Default Web Site to User1, you receive the following dialog box.
You need to ensure that you can delegate permissions for the Default Web Site to User1.
exhibit Which feature should you modify?

Your network contains a Web server that runs Windows Server 2008 R2.
You create an IIS Manager user account for a user named User1.
When you attempt to delegate permissions for the Default Web Site to User1, you receive the following dialog box.

You need to ensure that you can delegate permissions for the Default Web Site to User1.