Which solution will accomplish this?

Explanations:

EC2 instances cannot be directly copied to another Availability Zone. You must create an AMI and launch a new instance in the target AZ.

Creating an AMI of the EC2 instance and launching it in a different Availability Zone is the correct way to move the instance. The original instance can then be terminated.

AWS CLI cannot be used to move an EC2 instance between Availability Zones directly. The instance must be recreated in the desired AZ using an AMI.

You cannot modify the Availability Zone of an EC2 instance directly. To move it, you must stop the instance, create an AMI, and launch it in the new AZ.