Management Has Decided to Deploy All AWS VPCs with IPv6

Management has decided to deploy all AWS VPCs with IPv6 enabled. After some time, a solutions architect tries to launch a new instance and receives an error stating that there is not enough IP address space available in the subnet. What should the solutions architect do to fix this?

A) Check to make sure that only IPv6 was used during the VPC creation.
B) Create a new IPv4 subnet with a larger range, and then launch the instance.
C) Create a new IPv6-only subnet with a large range, and then launch the instance.
D) Disable the IPv4 subnet and migrate all instances to IPv6 only. Once that is complete, launch the instance.