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You have decided to change the instance type for instances running in your application tier that is using Auto
Scaling. In which area below would you change the instance type definition?

A.
Auto Scaling policy

B.
Auto Scaling group

C.
Auto Scaling tags

D.
Auto Scaling launch configuration

Explanation:
When selecting an instance to terminate when a scaling condition is met, Auto Scaling attempts to preserve
instances with the current launch configuration, and will thus terminate instances that do not have the current
launch configuration. When more than one instance meets this criterion, Auto Scaling will terminate the
instance running for the longest portion of a billable instance-hour (without running over). Optionally, you can
configure a policy to terminate the oldest or newest instance instead. To target a specific instance for
immediate termination, you can also use the TerminateInstanceInAutoScalingGroup API.

http://aws.amazon.com/ec2/faqs/

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