A Company Runs an Application on a Group of Amazon

Multiple Choice

A company runs an application on a group of Amazon Linux EC2 instances. The application writes log files using standard API calls. For compliance reasons, all log files must be retained indefinitely and will be analyzed by a reporting tool that must access all files concurrently. Which storage service should a solutions architect use to provide the MOST cost-effective solution?

A) Amazon EBS
B) Amazon EFS
C) Amazon EC2 instance store
D) Amazon S3