What could be the probable cause of this failure and roll back?

Deployment of a Security Gateway was initiated on AWS using a CloudFormation Template available through sk111013. The deployment process, after a while failed and rolled back .

What could be the probable cause of this failure and roll back?
A . The Security Management Server that will be managing the Security Gateway had a lower version
B . The specific software being deployed was not subscribed to in the AWS Marketplace Subscriptions
C . The template used was for some cloud platform other than AWS
D . The web browser used to run the template was not compatible

Answer: C