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An application running on EC2 needs read-only access to an S3 bucket. What is the MOST secure way to grant this permission?
A
Create an IAM user, generate an access key, and embed it in the application code
B
Attach an IAM role with a least-privilege S3 read policy to the EC2 instance profile
C
Enable the S3 bucket for public read access
D
Store the access key in an environment variable on the EC2 instance
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