Which types of deployment can the developer use to meet this requirement?

Explanations:

“All at once” deployment updates all instances at the same time, so it does not meet the requirement of deploying changes to new instances only.

“Immutable” deployment creates new EC2 instances with the updated configuration and replaces the old ones, meeting the requirement of deploying changes to new instances only.

“Rolling” deployment updates a batch of instances at a time, which does not guarantee changes will be deployed only to new instances.

“Blue/green” deployment creates a new environment (green) with the updated configuration and switches traffic to the new instances, satisfying the requirement of deploying changes to new instances only.

“Rolling with additional batch” involves updating instances in batches and adding new instances, but it still updates existing instances, which does not fully meet the requirement.