A company has an AWS Lambda function that needs read access to an Amazon S3 bucket that is located in the same AWS account. Which solution will meet these requirements in the MOST secure manner?

• AApply an S3 bucket policy that grants read access to the S3 bucket.
• BApply an IAM role to the Lambda function. Apply an IAM policy to the role to grant read access to the S3 bucket.
• CEmbed an access key and a secret key in the Lambda function’s code to grant the required IAM permissions for read access to the S3 bucket.
• DApply an IAM role to the Lambda function. Apply an IAM policy to the role to grant read access to all S3 buckets in the account.