To meet Universal Containers' goal of improving efficiency and reducing agent handling time with AI-generated responses, the best approach is to enable Service Replies, Service AI Grounding, and Grounding with Knowledge.

Service Replies generates responses automatically.

Service AI Grounding ensures that the AI is using relevant case data.

Grounding with Knowledge ensures that responses are backed by Salesforce Knowledge articles, allowing agents to identify whether a response is coming from the LLM or Salesforce Knowledge.

Option C does not include Service Replies, which is necessary for generating AI responses.

Option A lacks the Grounding with Knowledge, which is essential for identifying response sources.

For more details, refer to Salesforce Service AI documentation on grounding and service replies.