Amazon EBS snapshots have which of the following two characteristics? (Choose two.)

A. EBS snapshots only save incremental changes from snapshot to snapshot
B. EBS snapshots can be created in real-time without stopping an EC2 instance
C. EBS snapshots can only be restored to an EBS volume of the same size or smaller
D. EBS snapshots can only be restored and mounted to an instance in the same Availability Zone as the original EBS volume