Your department creates regular analytics reports from your company's log files All log data is collected in Amazon S3 and processed by daily Amazon ElasticMapR...

Your department creates regular analytics reports from your company's log files All log data is collected in Amazon S3 and processed by daily Amazon ElasticMapReduce (EMR) jobs that generate daily PDF reports and aggregated tables in CSV format for an Amazon Redshift data warehouse.
Your CFO requests that you optimize the cost structure for this system.
Which of the following alternatives will lower costs without compromising average performance of the system or data integrity for the raw data?