Answer:
A) Before the buyer and agent discuss the buyer's motivation and financial information.
Explanation:
The agent or sub-agent must disclose his/her agency status when the prospective buyer starts to talk about his/her property needs, motivations or preferences, and his/her financial information regarding the ability to purchase.
Many times the agent will introduce himself/herself as an agent the moment they are greeting a prospective buyer, but that is just good manners.