A financial services company located in London (UK) wants to ensure the data stored in their test account S3 bucket should be acopy of the data from the production account S3 bucket. Data sovereignty laws specify that the data must reside within the UK region. 
What steps implement the solution most effectively? (SELECT TWO.)

Answer options:

A.Configure S3 Bucket Lifecycle Policy.
B.Configure S3 Bucket Versioning.
C.Configure S3 Bucket Event Notification.
D.Configure Cross-Region Replication.
E.Configure Same-Region Replication.
F.Configure an AWS Lambda function to replicate S3 objects.

Answer: B and E
Option A is incorrect because S3 lifecycle policies allow you to automatically review objects within your S3 Buckets and have them moved to Glacier or have the objects deleted from S3. They are not responsible for data replication between AWS accounts.
Option B is CORRECT because S3 bucket versioning allows creating a version of objects or data stored in S3. We can ensure data replication from the production S3 bucket to the test account S3 bucket is ongoing by enabling the version.
Option C is incorrect because the Amazon S3 event notification feature enables you to receive notifications when certain events happen in your bucket. This does not provide a solution to replicate data from the production account to the test account.
Option D is incorrect because Cross Region replication allows S3 data to be copied from one AWS region to another. Since the ask is to keep the data in the UK region (London), we cannot be using this option. AWS currently has only one region in the UK.
Option E is CORRECT because S3 Same-Region Replication can be configured on an S3 bucket to replicate objects to another bucket in the same region automatically.
Option F is incorrect because implementing a Lambda function to replicate S3 objects to another bucket is not the optimal solution as it requires creating and managing custom code.
Reference:
https://docs.aws.amazon.com/AmazonS3/latest/dev/Versioning.htm
https://docs.aws.amazon.com/AmazonS3/latest/dev/replication.html