【单选题】
You are developing a user control for Windows Presentation Foundation (WPF) application.<br /> The user control contains a button. Both the user control and the hosting control must receive the button click event.<br /> You need to ensure that the user control responsd to the button click event before hosting control responds to the event.<br /> What should you do ?（）
A、 Use a bubbling routed event. In the button click event handler, set the Handled property to True
B、 Use a bubbling routed event. In the button click event handler, set the Handled property to False
C、 Use a standard Microsoft .NET event. Set Handled property to true.
D、 Use a tunneling routed event. Set the handled property to false.
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