Final answer:
A valid way to share the project area with a client who wants to view the data in ArcReader is to export the data to PDF and distribute.
Step-by-step explanation:
A valid way for the ArcGIS user to share the project area with a client who wants to view the data in ArcReader is to export the data to PDF and distribute.
PDF (Portable Document Format) is a widely compatible file format that preserves the map's layout, formatting, and data. The client can view the map using ArcReader software or any PDF viewer such as Adobe Acrobat Reader.