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A company is using an Amazon Redshift cluster to run analytics queries for multiple sales...

A company is using an Amazon Redshift cluster to run analytics queries for multiple sales teams. In addition to the typical workload, on the last Monday morning of each month, thousands of users run reports. Users have reported slow response times during the monthly surge.

The company must improve query performance without impacting the availability of the Redshift cluster.

Which solution will meet these requirements?

A.

Resize the Redshift cluster by using the classic resize capability of Amazon Redshift before every monthly surge. Reduce the cluster to its original size after each surge.

B.

Resize the Redshift cluster by using the elastic resize capability of Amazon Redshift before every monthly surge. Reduce the cluster to its original size after each surge.

C.

Enable the concurrency scaling feature for the Redshift cluster for specific workload management (WLM) queues.

D.

Enable Amazon Redshift Spectrum for the Redshift cluster before every monthly surge.

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