A media company has deployed a multi-tier architecture on AWS. Web servers are deployed in two Availability Zones using an Auto Scaling group with a default Auto Scaling termination policy. The web servers’ Auto Scaling group currently has 15 instances running.
Which instance will be terminated first during a scale-in operation?
A. The instance with the oldest launch configuration.
B. The instance in the Availability Zone that has most instances.
C. The instance closest to the next billing hour.
D. The oldest instance in the group.