Databricks Generative AI Engineer Associate Practice Test 1

An HR team keeps several hundred policy PDFs in a Unity Catalog volume. They want a chatbot that employees can ask questions such as "How many days of parental leave do I get?", and every answer must cite the policy document it came from. The team has little coding capacity and wants to use a Databricks Agent Bricks option rather than write a custom agent.

Which Agent Bricks option best fits this requirement?