An estimator receives a PDF drawing that is missing a graphical scale. However, they know the length of a specific wall is 40 feet. To ensure all subsequent measurements on this drawing are accurate, what is the first essential action they must perform?
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A
Draw a line over the wall and manually change its label in the Properties panel to '40 ft'.
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B
Select a preset scale from the Scale dropdown menu in the Measurements panel.
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C
Use the Calibrate tool to select the two endpoints of the known wall and enter '40 ft'.
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D
Use the Dynamic Fill tool to trace the entire room.