How should the Solutions Architect migrate the application to AWS?
Re-host WebSphere-based applications on Amazon EC2 behind a load balancer with Auto Scaling. Re-platform the IBM MQ to an Amazon EC2-based MQ. Re-platform the z/OS-based DB2 to Amazon RDS DB2.
Re-host WebSphere-based applications on Amazon EC2 behind a load balancer with Auto Scaling. Re-platform the IBM MQ to an Amazon MQ. Re-platform z/ OS-based DB2 to Amazon EC2-based DB2.
Orchestrate and deploy the application by using AWS Elastic Beanstalk. Re-platform the IBM MQ to Amazon SQS. Re-platform z/OS-based DB2 to Amazon RDS DB2.
Use the AWS Server Migration Service to migrate the IBM WebSphere and IBM DB2 to an Amazon EC2-based solution. Re-platform the IBM MQ to an Amazon MQ.
Explanations:
Re-platforming IBM DB2 on z/OS to Amazon RDS DB2 is not possible as Amazon RDS does not support DB2 for z/OS.
Re-hosting WebSphere on EC2, re-platforming IBM MQ to Amazon MQ (which is a managed service), and using EC2-based DB2 is a feasible solution.
Elastic Beanstalk is not suitable for migrating WebSphere-based applications, and Amazon SQS cannot replace IBM MQ.
AWS Server Migration Service is used for server migrations, but it is not ideal for migrating IBM DB2, and Amazon MQ is not suitable for all IBM MQ use cases.
I appraise that the answer is:
Re-host WebSphere-based applications on Amazon EC2 behind a load balancer with Auto Scaling. Re-platform the IBM MQ to an Amazon MQ. Re-platform z/ OS-based DB2 to Amazon EC2-based DB2.