An Organization Has Configured Two Single Availability Zones

An organization has configured two single availability zones. The Auto Scaling groups are configured in separate zones. The user wants to merge the groups such that one group spans across multiple zones. How can the user configure this?

A) Run the command as-join-auto-scaling-group to join the two groups
B) Run the command as-update-auto-scaling-group to configure one group to span across zones and delete the other group
C) Run the command as-copy-auto-scaling-group to join the two groups
D) Run the command as-merge-auto-scaling-group to merge the groups