What is one key difference between an Amazon EBS-backed…

What is one key difference between an Amazon EBS-backed and an instance-store backed instance?

A.
Amazon EBS-backed instances can be stopped and restarted.

B.
Instance-store backed instances can be stopped and restarted.

C.
Auto scaling requires using Amazon EBS-backed instances.

D.
Virtual Private Cloud requires EBS backed instances.

Explanation:
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ComponentsAMIs.html#storage-for-the-root-device