正解:C
Geo-redundancy is the distribution of mission-critical components or infrastructures, such as servers, across multiple data centers that reside in different geographic locations. Geo- redundancy acts as a safety net in case the primary site fails or in the event of a disaster or an outage that impacts an entire region. Geo-redundancy also reduces latency and ensures close proximity to end users by delivering web content from the nearest data center. Geo-redundancy is a common feature of cloud computing, as it provides high availability, reliability, and performance for cloud applications and services.