A DevOps engineer configures an Amazon CloudWatch alarm on a custom metric published by an EC2 Auto Scaling group. The alarm should trigger a scale-out action. Which component executes the scaling action when the alarm fires?
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A
AWS Lambda function subscribed to an SNS topic
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B
An Auto Scaling scaling policy linked to the CloudWatch alarm
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C
An EventBridge rule targeting the Auto Scaling group
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D
A Systems Manager Automation runbook