You Are Running a Database on an EC2 Instance, with the Data

You are running a database on an EC2 instance, with the data stored on Elastic Block Store (EBS) for persistence. At times throughout the day, you are seeing large variance in the response times of the database queries Looking into the instance with the isolate command you see a lot of wait time on the disk volume that the database's data is stored on. What two ways can you improve the performance of the database's storage while maintaining the current persistence of the data? (Choose two.)

A) Move to an SSD backed instance
B) Move the database to an EBS-Optimized Instance
C) T Use Provisioned IOPs EBS
D) Use the ephemeral storage on an m2 4xiarge Instance Instead