An Agentforce needs to create a Sales Email with a custom prompt template.

To ground a sales email on Opportunity Products, Events near the customer, and Tone and voice examples, the Agentforce Specialist should use a prompt-initiated flow. This flow can dynamically fetch the necessary data from related records in Salesforce and ground the generative AI output with contextually accurate information.

Option B (flex template) does not provide the ability to fetch dynamic data from Salesforce records automatically.

Option C (manual insertion) would not allow for the dynamic and automated grounding of data required for custom prompts.

Refer to Salesforce documentation on flows and grounding for more details on integrating data into custom prompt templates.