What is that extension?

An organization is designing a new S3 client that will integrate with ECS. They are evaluating the use of the EMC S3 API and the Amazon S3 API. The business need is to store images of their products along with their specifications and to have fast access to the images based on the stored specifications. The organization decides to use the EMC S3 API as it has the needed S3 API extension to do that.

What is that extension?
A . Metadata search
B . Bucket retention period
C . Byte range update
D . File system enabled

Answer: D