A user has launched an EC2 instance. The user is planning to setup the CloudWatch alarm. Which of the below mentioned
actions is not supported by the CloudWatch alarm?

A.
Notify the Auto Scaling launch config to scale up

B.
Send an SMS using SNS

C.
Notify the Auto Scaling group to scale down

D.
Stop the EC2 instance

Explanation:
Q: What actions can I take from a CloudWatch Alarm?
When you create an alarm, you can configure it to perform one or more automated actions when the metric you chose to
monitor exceeds a threshold you define. For example, you can set an alarm that sends you an email, publishes to an
SQS queue, stops or terminates an Amazon EC2 instance, or executes an Auto Scaling policy.
Since Amazon CloudWatch alarms are integrated with answer is A.
https://aws.amazon.com/cloudwatch/faqs/
Amazon Simple Notification Service, you can also use any notification type supported by SNS.