An Applications Team Has Successfully Deployed an AWS CloudFormation Stack

Multiple Choice

An Applications team has successfully deployed an AWS CloudFormation stack consisting of 30 t2-medium Amazon EC2 instances in the us-west-2 Region. When using the same template to launch a stack in us-east-2, the launch failed and rolled back after launching only 10 EC2 instances. What is a possible cause of this failure?

A) The IAM user did not have privileges to launch the CloudFormation template.
B) The t2.medium EC2 instance service limit was reached.
C) An AWS Budgets threshold was breached.
D) The application's Amazon Machine Image (AMI) is not available in us-east-2.