You are creating an Auto Scaling group whose Instances need to insert a custom metric into CloudWatch. Which method would be the best way to authenticate your CloudWatch PUT request?
A.
Create an IAM role with the Put MetricData permission and modify the Auto Scaling launch configuration to launch instances in that role
B.
Create an IAM user with the PutMetricData permission and modify the Auto Scaling launch configuration to inject the userscredentials into the instance User Data
C.
Modify the appropriate Cloud Watch metric policies to allow the Put MetricData permission to instances from the Auto Scaling group
D.
Create an IAM user with the PutMetricData permission and put the credentials in a private repository and have applications on the server pull the credentials as needed
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