The Prompt Builder and Data Cloud Integration Guide explains that Data Cloud information can be accessed directly through Data Cloud related lists or prompt-initiated flows, which fetch relevant data dynamically. The documentation states: "Prompt Builder supports retrieving Data Cloud data using related lists for contextual grounding or invoking flows that query Data Cloud objects at runtime. This enables AI prompts to generate summaries, recommendations, or insights directly from unified customer profiles." Option A is incorrect because direct access to data model objects (DMOs) in Flex templates is not supported in Prompt Builder. Option C (external APIs) is unnecessary, as Prompt Builder has native integration with Data Cloud.
Thus, Option B is the correct and Salesforce-documented method to access Data Cloud data from Prompt Builder.
References (AgentForce Documents / Study Guide):
* Salesforce Prompt Builder Guide: "Integrating with Data Cloud"
* AgentForce Study Guide: "Fetching Data Cloud Data with Prompt-Initiated Flows"
* Salesforce Data Cloud Documentation: "Using Related Lists in Prompt Templates"