A company is currently running a production workload on AWS that is very I/O intensive. Its workload consists of a single tier with 10 c4.8xlarge instances, each with 2 TB gp2 volumes. The number of processing jobs has recently increased, and latency has increased as well. The team realizes that they are constrained on the IOPS. For the application to perform efficiently, they need to increase the IOPS by 3,000 for each of the instances.
Which of the following designs will meet the performance goal MOST cost effectively?

A. Change the type of Amazon EBS volume from gp2 to io1 and set provisioned IOPS to 9,000.
B. Increase the size of the gp2 volumes in each instance to 3 TB.
C. Create a new Amazon EFS file system and move all the data to this new file system. Mount this file system to all 10 instances.
D. Create a new Amazon S3 bucket and move all the data to this new bucket. Allow each instance to access this S3 bucket and use it for storage.