Which of the following cannot be used in Amazon EC2 to control who has access to specific Amazon EC2 instances?
A. Security Groups
B. IAM System
C. SSH keys
D. Windows passwords
Which of the following cannot be used in Amazon EC2 to control who has access to specific Amazon EC2 instances?
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/security-iam.html