You have been tasked with planning the migration of your company's application from on-premises to Google Cloud. Your company's monolithic application is an ecommerce website. The application will be migrated to microservices deployed on Google Cloud in stages. The majority of your company's revenue is generated through online sales, so it is important to minimize risk during the migration. You need to prioritize features and select the first functionality to migrate. What should you do?

A. Migrate the Product catalog, which has integrations to the frontend and product database. B. Migrate Payment processing, which has integrations to the frontend, order database, and third-party payment vendor. C. Migrate Order fulfillment, which has integrations to the order database, inventory system, and third-party shipping vendor. D. Migrate the Shopping cart, which has integrations to the frontend, cart database, inventory system, and payment processing system.