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How can an EC2 instance access AWS resources like Amazon S3 and DynamoDB in the most operationally efficient way?
A
By creating and attaching an IAM role with necessary permissions to the EC2 instance.
B
By using an IAM user's access key and secret access key within the application.
C
By using an IAM user's access key and secret access key to set up a CLI profile on the EC2 instance.
D
By attaching an IAM role with required permissions to an administrative IAM user.
