Workday distinguishes between supplier categories, used as a single-value classification on each supplier record for reporting purposes, and supplier groups, which provide a more flexible, multi-value grouping mechanism that can be used for security, routing, and reporting across many overlapping use cases. The Official Workday Pro Procure-to-Pay Guide confirms that each supplier may be assigned to exactly one supplier category, while being added to an unlimited number of supplier groups, allowing suppliers to participate in many different group-based configurations simultaneously while maintaining a single primary classification. Option A is incorrect because limiting supplier groups to one would eliminate the flexibility that groups are specifically designed to provide. Option C is incorrect because allowing no limits on supplier categories would contradict the single-category design intended for consistent primary classification. Option D is incorrect because, although supplier groups are indeed unlimited, the option also incorrectly claims unlimited supplier categories, which is not supported by the supplier record's single-category field.