An ArcGIS user's plotter only prints up to 42 inches. What must the user do to print a wall map sized 84 inches x 60 inches?

The correct choice involves dividing the map data frames and tiling them to achieve the desired dimensions of 84 inches by 60 inches. This method is particularly relevant when working with a plotter that has limitations on print size, such as a maximum width of 42 inches.

By segmenting the map into multiple tiles, each measuring 42 inches or less, the user can effectively create a larger composite map once all the individual sections are printed. This approach ensures that the entire wall map, which is significantly larger than the output capacity of the plotter, can still be successfully produced by connecting the printed tiles together.

Tiling not only circumvents the plotter's printing constraints but also maintains the integrity of the map's visual elements and features across the large format, allowing for a comprehensive representation of the area without distortion or loss of detail. This technique is widely used in cartography for creating large-format maps that exceed the printing capabilities of standard equipment.

Other options may not effectively address the limitations of the printer or could lead to distorted outputs or impractical workflows.