Which configuration should be used to ensure mat AWS cr…

A company is building software on AWS that requires access to various AWS services. Which configuration
should be used to ensure mat AWS credentials (i.e., Access Key ID/Secret Access Key combination) are not
compromised?

A.
Enable Multi-Factor Authentication for your AWS root account.

B.
Assign an IAM role to the Amazon EC2 instance.

C.
Store the AWS Access Key ID/Secret Access Key combination in software comments.

D.
Assign an IAM user to the Amazon EC2 Instance.

Explanation:
http://docs.aws.amazon.com/IAM/latest/UserGuide/IAMBestPractices.html