An organization has branches across the world, and there are many applications deployed across AWS regions. As per organization compliance requirements, data in an S3 bucket should be copied to another S3 bucket in a different region in 24 hrs period.
How can this be achieved with minimal cost? 

Answer options:

A.Use the S3 cp command to copy the data from one AWS region to another AWS region.
B.Use Amazon S3 select to copy the data from one AWS region to another AWS region.
C.Enable S3 versioning on source and destination buckets and copy the data using cross-region replication.
D.Create a Lambda function in each AWS region to run AWS CLI "s3 sync" periodically to replicate data from one region to another region.

Correct Answer – C
Option A is incorrect as S3 cp is an AWS CLI command where a custom program is required. S3 CP can copy data from one bucket to another, but this won`t be a cost-effective solution.
Option B incorrect because S3 Select uses SQL-like statements where objects are filtered at the S3 end (service side) for an end-user application and can not be used to copy data to another bucket in another region.
Option C is CORRECT because versioning on source and destination buckers should be enabled. Using Cross-region replication rules, data from bucket in one region to bucket in another region can be copied in 24 hrs. This replication is not sensitive to latency.
Option D is incorrect because this option needs a Lambda function in each region to execute the AWS CLI command. This method takes more efforts and is not cost-efficient.
Reference:
https://aws.amazon.com/premiumsupport/knowledge-center/move-objects-s3-bucket/
https://docs.aws.amazon.com/AmazonS3/latest/dev/replication.html