Comprehensive Detailed Explanation If a chatbot must query a knowledge base (KB), the Bot Framework uses QnAMakerDialog (inherited into Azure Cognitive Service for Language's Question Answering). AdaptiveDialog manages complex dialog flows but not specifically KB querying. ComponentDialog organizes dialogs, but again, not specific for knowledge bases. SkillDialog is used when invoking another bot (skill), not for KB queries. The answer: B. QnAMakerDialog Reference: Use QnAMakerDialog in Bot Framework