You are creating a Windows Forms multi-document interface (MDI) application by using the .NET Framework 3.5.
You create an MDI container form in the application. You add a MenuStrip control to the MDI container form.
The ToolStripMenuItem structure of an MDI container is as shown in the following image. You create an MDI child form in the application.
You add a MenuStrip control to the MDI child form. The ToolStripMenuItem structure of the MDI child form is as shown in the following image.
You need to ensure that when the MDI child form is displayed, the top-level menu is displayed as shown in the following image.
Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)

A.
Set the MergeAction property of the File ToolStripMenuItem of the MDI child form to Append.

B.
Set the MergeAction property of the Open ToolStripMenuItem of the MDI child form to Replace.

C.
Set the MergeAction property of the Open ToolStripMenuItem of the MDI child form to Append.

D.
Set the MergeAction property of the File ToolStripMenuItem of the MDI child form to MatchOnly.

E.
Set the MergeAction property of the File ToolStripMenuItem of the MDI container form to MatchOnly.

F.
Set the MergeAction property of the Open ToolStripMenuItem of the MDI container form to MatchOnly.