Which namespace must be included in your XNA code to support a game pad, a keyboard, and a mouse?

Which namespace must be included in your XNA code to support a game pad, a keyboard,
and a mouse?

A.
Microsoft.Xna.Framework.Design

B.
Microsoft. Xna.Framework. Media

C.
Microsoft.Xna.Framework. Input

D.
Microsoft.Xna.Framework.Net

E.
Microsoft.Xna.Framework.GamerServicea

F.
Microsoft.Xna.Framework.Storage

Explanation:
http://msdn.microsoft.com/en-us/library/microsoft.xna.framework.input.aspx