What are commercial coaches primarily used for?

Commercial coaches are primarily designed and used as mobile units for commercial purposes. This includes applications such as office spaces, retail shops, and restaurants, allowing businesses to operate in a portable manner. Their design and configuration cater specifically to business needs, often providing amenities and layouts suitable for customer interaction and operational efficiency.

In contrast, other options refer to different uses that do not align with the primary function of commercial coaches. Similarly, residential purposes typically involve living spaces, which are not the main intent for commercial coaches. The option concerning transporting goods suggests a capability more aligned with freight vehicles rather than mobile business applications. Lastly, while emergency housing solutions are crucial, they fall under different categories of mobile housing units designed specifically for temporary residences rather than for ongoing commercial activities. Thus, the focus on commercial use helps clarify why this choice stands out as the most accurate description.