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The Departments table in the database contains four columns. In a new form, you use the Data Block Wizard to add all columns to the block, but in the layout
Wizard, you choose all columns except Location_id to add to the canvas. The Object Navigator and layout Editor appear as shown in the Exhibit. You then decide that you do need to display Location_id on the canvas. What object must you select before invoking the Layout Editor in re-entrant mode to make this change?
A. the text item tool in the Layout Editor
B. Frame 16 in either the Object Navigator or the layout Editor
C. Canvas4 in either the Object Navigator or the Layout Editor
D. Location_id in the Object Navigator
E. the Departments data block in the Object Navigator