Universal Containers (UC) is using standard Service AI Grounding.

Service AI Grounding retrieves data from Salesforce objects to ground AI-generated responses. Key considerations:

Field Types: Standard Service AI Grounding supports String and Text Area fields. Custom rich text fields (e.g., RichTextArea) are not supported, making Option B correct.

Objects: While Service AI Grounding primarily uses Case and Knowledge objects (Option A), the limitation here is the field type, not the object.

Visibility: Service AI Grounding respects user permissions and sharing settings unless overridden (Option C is incorrect).

References:

Salesforce Help: Service AI Grounding Requirements

Explicitly states support for "Text Area and String fields" only.