An investment adviser has legal access to a broker-dealer's confidential research document and uses the information to support a recommendation to a client. The investment is successful. Under NASAA's Model Rule on Unethical Business Practices of Investment Advisers, Investment Adviser Representatives, and Federal Covered Advisers, the adviser A) must notify the client that the recommendation was based on the broker-dealer's research document B) must provide the client with a copy of the research document C) must share the commission with the broker-dealer that prepared the research document D) need not disclose the source of the information