Which Amazon Storage behaves like raw, unformatted, external block devices that you can attach to your
instances?

A.
None of these.

B.
Amazon Instance Storage

C.
Amazon EBS

D.
All of these

Explanation:
An EBS volume behaves like a raw, unformatted, external block device that you can attach to a single instance.
The volume persists independently from the running life of an instance.