The custom AI agent must select topics based on a description of the purpose of the query, rather than relying on fixed trigger phrases. That is exactly the scenario where generative orchestration is the right configuration.

Why B is correct:

It enables the agent to choose the best topic, tool, or action based on the semantic meaning of the user’s request

It supports more conversational interactions

It aligns directly with the requirement that topic selection should not depend on trigger phrases

Why the other options are not correct:

A. Azure OpenAI reasoning models concerns model capability, not topic-routing behavior in Copilot Studio

C. classic orchestration relies more on predefined topics and trigger phrases

D. AI-assisted evaluators are for assessment/testing, not runtime orchestration