What should the SysOps administrator do to meet these requirements?

Explanations:

A cluster placement group is designed for high-performance computing and does not ensure instances are on distinct underlying hardware. It places instances close together to reduce latency, which is not suitable for high availability.

A partition placement group allows you to isolate groups of instances, but it does not ensure that the instances are on distinct underlying hardware across multiple AWS Regions. It is intended for applications that require high throughput and low latency within a single Region.

A spread placement group is meant for ensuring that instances are spread across distinct underlying hardware, but launching instances in multiple AWS Regions does not conform to a single spread placement group, which is limited to one Region.

A spread placement group in a single AWS Region ensures that each instance is placed on distinct underlying hardware, maximizing high availability by minimizing the risk of simultaneous failure due to hardware issues. This is the appropriate option to meet the requirement.