A company’s application is running on Amazon EC2 instances within an Auto Scaling group behind an Elastic Load Balancer. Based on the application’s history, the company anticipates a spike in traffic during a holiday each year. A solutions architect must design a strategy to ensure that the Auto Scaling group proactively increases capacity to minimize any performance impact on application users.
Which solution will meet these requirements?
A . an Amazon Cloud Watch alarm to scale up the EC2 instances when CPU utilization exceeds 90%.
B . Create a recurring scheduled action to scale up the Auto Scaling group before the expected period of peak demand.
C . Increase the minimum and maximum number of EC2 instances in the Auto Scaling group during the peak demand period.
D . Configure an Amazon Simple Notification Service (Amazon SNS) notification to send alerts when there are autoscaling: EC2_INSTANCE_LAUNCH events .
Answer: B
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