A database specialist is working on an Amazon RDS for PostgreSQL DB instance that is experiencing application performance issues due to the addition of new workloads. The database has 5 of storage space with Provisioned IOPS. Amazon CloudWatch metrics show that the average disk queue depth is greater than 200 and that the disk I/O response time is significantly higher than usual.
What should the database specialist do to improve the performance of the application immediately?

A. Increase the Provisioned IOPS rate on the storage.
B. Increase the available storage space.
C. Use General Purpose SSD (gp2) storage with burst credits.
D. Create a read replica to offload Read IOPS from the DB instance.