There is a very serious outage happening at AWS, and lots of services are impacted. Your existing EC2 instances seem to work fine, and the status checks of the instances have passed. But when you try to launch a new instance from an EBS snapshot, the operation is unsuccessful. What might be the issue?

Answer options:

A.The AWS Console is down, so your AWS CLI commands do not work.
B.S3 has an issue. As the EBS snapshots are saved in S3, you cannot launch an instance from the EBS snapshot.
C.AWS turns off all the EC2 related API calls when there are major outages to protect from system floods.
D.There is an outage in the AWS CloudWatch service.

Answer – B
The EBS Snapshots are stored in S3. If there is an outage of the S3 service, you may not be able to launch an instance from an EBS snapshot. 
Option A is incorrect because this option does not mention anything about the EBS snapshot service.
Option C is incorrect because the EC2 related API calls are still working. Otherwise, the status check of the instances will fail.
Option D is incorrect because the CloudWatch service will not impact the EBS snapshot service.
For more information on EBS Snapshots, please visit the below URL:
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/EBSSnapshots.html