You create a mobile Web application. You need to use a Command control to post user input from the UI elements back to the server. What are two possible ways to achieve this goal?（）

• A、Place the Command control within an instance of the System.Web.UI.MobileControls.SelectionList control.
• B、Place the Command control within an instance of the System.Web.UI.MobileControls.ObjectList control.
• C、Place the Command control within an instance of the System.Web.UI.MobileControls.Form control.
• D、Place the Command control within an instance of the System.Web.UI.MobileControls.Panel control.