You have added multiple knowledge sources to a Copilot Studio agent (SharePoint, a website, and uploaded PDFs). Users complain the agent sometimes combines contradictory information from different sources in the same answer. Which setting helps prioritize one knowledge source over others?

When a Copilot Studio agent has multiple knowledge sources configured, the generative answers system may retrieve relevant chunks from multiple sources and attempt to synthesize them into a single answer. If sources contain contradictory information (e.g., an outdated website says policy A, but the SharePoint document says updated policy B), the combined answer may confuse users.

Copilot Studio's knowledge configuration allows you to set a priority order among knowledge sources. When the system retrieves content from multiple sources for the same query, it weights higher-priority sources more heavily when synthesizing the final answer. Placing authoritative sources (like official SharePoint policy libraries) at the top ensures their content dominates.

Option A (100% confidence threshold) would return answers only when a near-perfect match exists — this would cause many questions to receive no answer rather than resolving contradictions.

Option C (delete and re-add as topics) loses the generative capability. Classic topics are manually authored, not dynamically retrieved from documents.

Option D ('single source mode') is a fabricated setting name — no such exactly-named setting exists in Copilot Studio. While you can configure knowledge sources to restrict retrieval, the priority ordering is the documented approach.

Exam tip: source contradictions → knowledge source priority ordering. Put authoritative sources first.