Your company is deploying an AI-driven chatbot for customer service. The chatbot must interact with a CRM system, be scalable, and must support complex conversational workflows. What GCP services would best fit these requirements?

*Explanation:* To meet the requirements of an AI-driven chatbot that interacts with a CRM system, needs scalability, and supports complex conversational workflows, the best combination of GCP services is **Dialogflow CX integrated with Cloud Functions and Pub/Sub (option A. **. Dialogflow CX provides the capabilities for creating complex conversational workflows, Cloud Functions allow integration with the CRM system, and Pub/Sub enables messaging between components. This combination ensures scalability, flexibility, and CRM integration for the chatbot. The other options may not offer the same level of conversational AI capabilities and integration required for this use case.