In differentiating between protection configurations, which option provides the highest level of data durability for ECS object storage?

In differentiating between protection configurations, which option provides the highest level of data durability for ECS object storage?
A . Single-copy storage in one Availability Zone
B . Data replication across multiple Availability Zones within a region
C . Encryption at rest only, without additional replication
D . Storing backups on physical media offsite

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Answer: B