A Data Analyst is creating a new data source made up of multiple tables and...

Tableau relationships provide a logical-layer approach to combining tables without requiring a fixed join type when the data source is created. The related tables remain separate, preserving their native level of detail. When a visualization is queried, Tableau evaluates the fields currently being used and automatically determines the appropriate joins required for that analytical context. This makes relationships dynamic and context-aware. Option A is incorrect because the matching fields that define the relationship are established when the relationship is configured; they do not change simply because of user interactions. Option B is incorrect because relationships do not store the entire data source in a pre-aggregated format. Option D describes physical joining more closely because relationships specifically avoid merging all related tables into one physical table. Therefore, C accurately describes the principal advantage.