Which feature of Amazon S3 could be utilized to save costs by automatically transitioning objects to appropriate low-cost storage classes at defined intervals?

Answer options:

A.By configuring “Amazon S3 lifecycle policies”
B.Using Versioning
C.Enabling replication
D.Performing S3 Batch Operations

Answer: A
Option A is CORRECT. Using “Amazon S3 lifecycle policies”, we can set up rules to perform “Transition Actions” and “Expiration Actions”. Transition actions define the rules as to when an object transitions to different storage classes.
Option B is INCORRECT. S3 versioning enables maintaining multiple versions of an object in one bucket.
Option C is INCORRECT. Replication enables duplication/copy of objects from one S3 bucket to another S3 bucket, either in the same region or different region.
Option D is INCORRECT. S3 Batch Operations are used to perform batch operations on objects in S3. Batch operation can perform a single operation on a specified list of S3 objects. Automatic transition of objects to different storage classes could not be done via S3 batch operations.
Reference:
https://docs.aws.amazon.com/AmazonS3/latest/dev/object-lifecycle-mgmt.html
https://docs.aws.amazon.com/AmazonS3/latest/dev/ObjectVersioning.html
https://docs.aws.amazon.com/AmazonS3/latest/dev/replication.html
https://docs.aws.amazon.com/AmazonS3/latest/dev/batch-ops.html