A big real estate firm is considering the cost-effective addition of a location- based alert to their current mobile application. Currently, the application's backend architecture is hosted on AWS. Users who subscribe up to this service will get smartphone notifications about real-estate otters in their vicinity. To be relevant, warnings must be sent within a few minutes. The present mobile application is used by 5 million people in the United States. Which of the following architectural recommendations would you offer to a client? | AWS Certified Solutions Architect - Professional Quiz