Which of the following describes some of the core functionality of Amazon S3? A. Amazon S3 is a high-performance block storage service that is designed for use with Amazon EC2. B. Amazon S3 is an object storage service that provides high-level performance, security, scalability, and data availability. C. Amazon S3 is a fully managed, highly reliable, and scalable file storage system that is accessible over the industry-standard SMB protocol. D. Amazon S3 is a scalable, fully managed elastic NFS for use with AWS Cloud services and on-premises resources.