A company repeatedly discovers overlapping CIDRs across independently created VPCs. Future acquisitions must be easier to integrate. Which governance improvement is most appropriate?

1. Use centrally governed IPAM pools and allocation rules with monitored utilization.
2. Wait until application cutover before reviewing every network address plan.
3. Allocate the same large private range to every account.
4. Use different DNS names for identical IP ranges and assume routing is unique.