Final answer:
Each Microsoft Azure region contains multiple datacenters. This configuration ensures redundancy and enhances the reliability and availability of hosted services.
Step-by-step explanation:
The question asks about the composition of Azure regions in terms of datacenters. Specifically, it queries whether each region has a single datacenter, multiple datacenters, or no datacenters. The answer is B) Multiple datacenters. Microsoft Azure is a cloud computing service created by Microsoft for building, testing, deploying, and managing applications and services through Microsoft-managed data centers. Each Azure region is comprised of multiple data centers that are networked together. The reason for this is redundancy; having multiple datacenters helps ensure that if one datacenter encounters a problem, the others can potentially handle the additional load, thus providing greater reliability and availability for services hosted in that region.