Final answer:
Deploying virtual machines to two or more regions can achieve high availability and is a good strategy for ensuring service continuity in the event of a single data center failure.
Step-by-step explanation:
If a student needs to ensure that services running on virtual machines are available in the event of a single data center failure, deploying the virtual machines to two or more regions is indeed a valid strategy. This practice is often referred to as geographical redundancy or multi-region deployment, and it helps in achieving high availability for the services. If one region fails due to a disaster or other significant issues, the other region can continue to provide the services, thus reducing the risk of downtime.
Disaster recovery and business continuity planning are critical for maintaining service availability, and multi-region deployments are a key component of these strategies. However, it's important to ensure that the deployment includes mechanisms for data replication and failover processes that can automatically redirect traffic to the available region without manual intervention. Also, consider the data sovereignty and regulatory compliance requirements when selecting regions.