Remove backup objects older than 90 days from a Cloud Storage bucket to optimize ongoing storage costs. What should you implement?

Cloud Storage lifecycle management is the native and most efficient way to automatically manage object lifecycles, including deleting old objects. These rules are defined in JSON format. gsutil is the command-line tool used to apply these rules to buckets. Writing a lifecycle management rule in XML is incorrect as Cloud Storage uses JSON for these configurations. Scheduling a cron script using gsutil ls to find and remove items is inefficient and not the recommended approach, as it involves external computation and manual scripting rather than leveraging the built-in, optimized Cloud Storage features. The ls command itself only lists objects and doesn't perform deletion.