Answer:
The user should use;
B. The Compress Pictures tool to change the picture's size
Explanation:
The Compress Pictures tool in Microsoft Word allows a user to reduce a picture's file size inside the application window with options of compressions based on the intended use of the picture such as for emailing or onscreen view.
Options are available to compress all the pictures in the file or only those which are selected
The Picture Format tab is automatically displayed when a picture is selected and the Compress Pictures tool is included in the Adjust group within the displayed Pictures Format tab ribbon.