A. Create an AWS Lambda function that checks CPU utilization and sends the notification.
B. Use AWS CloudTrail to check the CPU utilization metric. Set up an Amazon Simple Notification Service (Amazon SNS) topic to send the notification.
C. Use Amazon CloudWatch to set a CPU utilization alarm. Set up an Amazon Simple Notification Service (Amazon SNS) topic to send the notification.
D. Use the Amazon CloudWatch dashboard to monitor CPU utilization. Set up an Amazon Simple Notification Service (Amazon SNS) topic to send the notification.

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