Your team is planning to migrate an existing stateless application to App Engine. The application makes extensive API calls and processes large data streams. You need to decide between App Engine Standard and App Engine Flexible. What factors should you consider? (Select 2)

*Explanation:* Required runtime environment customizations AND The ability to deploy containerized applications. A. Correct. If your application requires custom runtime environments, App Engine Flexible is a better choice. B. Incorrect. Both App Engine Standard and Flexible can support real-time data processing, but this is not a differentiating factor. C. Incorrect. While cost can be a factor, it's not specifically related to the choice between Standard and Flexible in the context of the application's needs. D) Correct. If containerization is a requirement, App Engine Flexible is the right choice. E) Incorrect. Geolocation-based request routing can be achieved independently of the choice between Standard and Flexible.