You are creating an ASP.NET application by using the .NET Framework 3.5.

You need to create a UI element in the application to meet the following requirements:

* Custom logic can be implemented.
* The element can be used in multiple places on each page.
* The element can be used on multiple pages within the application.
* The element can be redistributed for use in other applications without sharing source code or layout files.

What should you do?

A.
Create a theme.

B.
Create a master page.

C.
Create a user control.

D.
Create a custom Web control.