You want to store critical business information in Cloud Storage buckets. The information is regularly changed, but previous versions need to be referenced on a regular basis. You want to ensure that there is a record of all changes to any information in these buckets. You want to ensure that accidental edits or deletions can be easily rolled back. Which feature should you enable?

Object Versioning is the correct feature to enable because it keeps a non-current version of an object each time the live object is overwritten or deleted. This directly addresses the need to reference previous versions, record all changes, and easily roll back accidental edits or deletions. Bucket Lock prevents objects from being deleted or overwritten for a specified retention period, which is useful for compliance but doesn't track multiple versions of an object. Object change notification sends alerts when objects are changed, but it doesn't store previous versions. Object Lifecycle Management automates actions like deleting or archiving objects based on their age or other conditions, which is not designed for version tracking and recovery.