A company would like to migrate its current on-premises workloads to the public cloud. The current platform requires at least 80 instances running at all times to work properly. The company wants the workload to be highly available, even if the cloud provider loses one region due to a catastrophe, and the costs to be kept to a minimum. Which of the following strategies should the company implement?

A. Create /25 subnets in two regions and run 80 instances on each one.
B. Create /26 subnets in two regions and run 40 instances on each one.
C. Create /26 subnets in three regions and run 40 instances on each one.
D. Create /26 subnets in three regions and run 80 instances on each one.