Answer: Deleting IAM users

The correct answer is A. Deleting IAM users is an action that can only be performed by the AWS account root user or an IAM user with administrator permissions. IAM users themselves do not have the permission to delete other IAM users. This is a security measure to ensure that only authorized users can manage IAM users within an AWS account. The other options, such as changing AWS Support plans or creating an AWS organization, can be performed by IAM users with the appropriate permissions, and do not require the use of the AWS account root user credentials.

Author: LeetQuiz Editorial Team