A company has a two-tier application running on an Amazon EC2 server that handles all of its AWS based e-commerce activity. During peak times, the backend servers that process orders are overloaded with requests. This results in some orders failing to process. A developer needs to create a solution that will re-factor the application. Which steps will allow for more flexibility during peak times, while still remaining cost-effective? (Choose two.)

Topic #: - All AWS Certified Developer Associate Questions

A. Increase the backend T2 EC2 instance sizes to x1 to handle the largest possible load throughout the year.
B. Implement an Amazon SQS queue to decouple the front-end and backend servers.
C. Use an Amazon SNS queue to decouple the front-end and backend servers.
D. Migrate the backend servers to on-premises and pull from an Amazon SNS queue.
E. Modify the backend servers to pull from an Amazon SQS queue.

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