which area below would you change the instance type definition?

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

A.
Auto Scaling launch configuration

B.
Auto Scaling group

C.
Auto Scaling policy

D.
Auto Scaling tags

Explanation:

http://docs.aws.amazon.com/AutoScaling/latest/DeveloperGuide/WhatIsAutoScaling.html