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

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.

Answer: A

Explanation:

Reference: http://docs.aws.amazon.com/AWSEC2/Iatest/UserGuide/ComponentsAMis.html#storage-for-theroot-device