Refer to the following scenario to answer the question below.

Every purchase item in Workday must be assigned exactly one spend category, which serves as its primary, required classification, but organizations frequently need to report on items using additional, secondary classifications that do not fit within the single spend category model. The Official Workday Pro Procure-to-Pay Guide identifies Related Worktags as the mechanism for associating one or more additional classification values, such as General Use or Promotional, with a single item, supplementing its primary spend category without altering it. Option A is incorrect because item substitutes define alternative items that can be used in place of another for sourcing purposes, and have no role in classification or reporting tags. Option B is incorrect because spend category is limited to a single required value per item, the Office Supplies classification in this scenario, and cannot be used to add further classifications. Option D is incorrect because purchase item groups bundle multiple distinct items together for grouped reporting, rather than adding multiple classification tags to a single item.