An online photo-sharing company stores photos in an Amazon S3 bucket in us-west-1. The company must store a copy of every new photo in us-east-1 with the LEAST operational effort. Which solution meets this requirement?

The correct solution is to use S3 Cross-Region Replication (CRR). CRR is a managed service that automatically and asynchronously copies new objects from a source S3 bucket to a destination S3 bucket in a different AWS Region. This requires minimal operational effort once configured, as S3 handles the replication process. Incorrect options: CORS is for allowing web applications loaded in one domain to interact with resources in a different domain; it does not replicate data between S3 buckets. S3 Lifecycle rules manage object transitions between storage classes or object expiration within a single bucket or across buckets in the same region, but they do not inherently copy objects to a different region. While using S3 event notifications with Lambda could technically copy objects, it involves developing and maintaining custom Lambda code, which increases operational effort compared to the fully managed S3 CRR.