Which solution will meet this requirement?

A company has multiple Amazon EC2 instances that run a resource-intensive application in a development environment. A SysOps administrator is implementing a solution to stop these EC2 instances when they are not in use.

Which solution will meet this requirement?
A . Assess AWS CloudTrail logs to verify that there is no EC2 API activity. Invoke an AWS Lambda function to stop the EC2 instances.
B . Create an Amazon CloudWatch alarm to stop the EC2 instances when the average CPU utilization is lower than 5% for a 30-minute period.
C . Create an Amazon CloudWatch metric to stop the EC2 instances when the VolumeReadBytes
metric is lower than 500 for a 30-minute period.
D . Use AWS Config to invoke an AWS Lambda function to stop the EC2 instances based on resource configuration changes.

View Answer

Answer: B

Explanation:

https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/UsingAlarmActions.html#AddingStopActions