You need to create a Web control that displays an ASCX control.

Which event should you use to render the Web control?

A.
CreateChildControls

B.
LoadControlState

C.
SaveViewState

D.
SetDesignModeState

Explanation:
MNEMONIC RULE: “display ASCX control = CreateChildControl”

BaseFieldControl.CreateChildControls Method
http://msdn.microsoft.com/en-us/library/microsoft.sharepoint.webcontrols.basefieldcontrol.createchildcontrols.aspx