Which code segment should you insert at line 01?

You are creating a custom control named Contoso by using the following code segment.
(Line numbers are included for reference only.)

You need to define the namespace. Which code segment should you insert at line 01?

A.
WinJS.Namespace.define (“Contoso”) ;

B.
WinJS.Namespace.defineWithParent (“Contoso”) ;

C.
WinJS.Class.define (“Contoso”) ;

D.
WinJS.Class.defineWithParent (“Contoso”) ;