A company runs an Amazon Redshift cluster on RA3 nodes and needs to scale read and write capacity to meet demand. Which action will enable concurrency scaling?

Concurrency scaling in Amazon Redshift allows you to handle sudden increases in query volume by automatically adding additional cluster capacity. For a provisioned Redshift cluster (like one running on RA3 nodes), you enable concurrency scaling at the Workload Management (WLM) queue level. This allows specific queues to utilize concurrency scaling when their workload exceeds the cluster's current capacity. The other options are incorrect: Redshift Serverless workgroups have automatic scaling built-in and don't use WLM in the same way provisioned clusters do for concurrency scaling. Concurrency scaling is not a setting applied during any new Redshift cluster creation; it's a WLM configuration for provisioned clusters. Daily usage quota for a Redshift cluster relates to cost management and does not enable or disable concurrency scaling functionality.