QnA Maker (now part of Azure AI Language Service - Custom Question Answering) enables bots to answer user queries by extracting questions and answers from structured sources like FAQs, webpages, and documents (e.g., Word, PDF). In this scenario, where data comes from a Microsoft Word troubleshooting guide and a FAQ webpage, QnA Maker automatically extracts knowledge and creates a searchable knowledge base.
Other options are incorrect:
* A. Language Understanding (LUIS): Detects intents, not question-answer pairs.
* B. Text Analytics: Extracts key phrases and sentiment but does not support conversational responses.
* C. Azure Bot Service: Hosts bots, but it requires QnA Maker for knowledge sources.