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AWS Certified DevOps Engineer - Professional · AWS
Select one answer.
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B is correct: <wants to be notified by email> means SNS. <EC2 instances in an Auto Scaling group> means this should be triggered by auto scaling group A, C and D: no mention of both SNS and auto scaling group
Likely B: https://aws.amazon.com/blogs/aws/auto-scaling-notifications-recurrence-and-more-control/ "EC2_INSTANCE_LAUNCH_ ERROR"
B is correct https://docs.aws.amazon.com/autoscaling/ec2/userguide/ec2-auto-scaling-sns-notifications.html