Which AWS service helps to achieve this automation?

A user is using the AWS EC2. The user wants to make so that when there is an issue in the EC2 server, such as instance status failed, it should start a new instance in the user’s private cloud.

Which AWS service helps to achieve this automation?
A . AWS CloudWatch + Cloudformation
B . AWS CloudWatch + AWS AutoScaling + AWS ELB
C . AWS CloudWatch + AWS VPC
D . AWS CloudWatch + AWS SNS

Answer: D

Explanation:

Amazon SNS can deliver notifications by SMS text message or email to the Amazon Simple Queue Service (SQS) queues or to any HTTP endpoint. The user can configure a web service (HTTP End point) in his data center which receives data and launches an instance in the private cloud. The user should configure the CloudWatch alarm to send a notification to SNS when the “StatusCheckFailed” metric is true for the EC2 instance. The SNS topic can be configured to send a notification to the user’s HTTP endpoint which launches an instance in the private cloud.