A company stores data in an Amazon Simple Storage Service $($Amazon S$3)$ bucket.

Which solution provides the most efficient way to ensure that all new and existing

objects and metadata are copied to another Region for disaster recovery $($DR$)?$

Enable cross$-$Region replication on the bucket and copy existing objects onto

themselves.

Use an AWS Lambda function to copy objects, so that all object create

events trigger the function.

Create a workflow with AWS Step Functions and AWS Lambda to

synchronize the buckets.

Copy existing objects to the target bucket, and configure clients to write

new files to both buckets.