A user is planning to scale up an application by 8 AM and scale down by 7 PM daily using Auto Scaling. What should the

user do in this case?

A.
Setup the scaling policy to scale up and down based on the CloudWatch alarms

B.
The user should increase the desired capacity at 8 AM and decrease it by 7 PM manually

C.
The user should setup a batch process which launches the EC2 instance at a specific time

D.
Setup scheduled actions to scale up or down at a specific time

Explanation:
Scale based on a schedule.
Sometimes you know exactly when you will need to increase or decrease the number of instances in your group, simply
because that need arises on a predictable schedule. Scaling by schedule means that scaling actions are performed
automatically as a function of time and date. For more information, see Scheduled Scaling.
http://docs.aws.amazon.com/AutoScaling/latest/DeveloperGuide/schedule_time.html