An AWS Account Owner Has Setup Multiple IAM Users

Multiple Choice

An AWS account owner has setup multiple IAM users. One IAM user only has CloudWatch access. He has setup the alarm action which stops the EC2 instances when the CPU utilization is below the threshold limit. What will happen in this case?

A) It is not possible to stop the instance using the CloudWatch alarm
B) CloudWatch will stop the instance when the action is executed
C) The user cannot set an alarm on EC2 since he does not have the permission
D) The user can setup the action but it will not be executed if the user does not have EC2 rights