How can a user add a descendant to a virtual document in Webtop?

A.
1. Add the descendent from the system Clipboard.
2. Create a new document to be used as the descendant.
3. Drag-and-drop the descendent to the virtual document.
4. Select a file from the user’s system to be used as the descendent.

B.
1. Create a new window and reposition the descendent.
2. Modify the version label of the virtual document.
3. Remove an existing descendent and import an earlier version.
4. Specify the document’s URL.

C.
1. Create a new document to be used as the descendant.
2. Create a new window and reposition the descendent.
3. Drag-and-drop the descendent to the virtual document.
4. Specify the document’s URL.

D.
1. Add the descendent from the system Clipboard.
2. Drag-and-drop the descendent to the virtual document.
3. Modify the version label of the virtual document.
4. Select a file from the user’s system to be used as the descendent.