A company is migrating a NoSQL database cluster to Amazon EC2. The database automatically replicates data to maintain at least three copies of the data. I/O throughput of the servers is the highest priority.
Which instance type should a solutions architect recommend for the migration?
A . Storage optimized instances with instance store
B . Burstable general purpose instances with an Amazon Elastic Block Store (Amazon EBS) volume
C . Memory optimized instances with Amazon Elastic Block Store (Amazon EBS) optimization enabled
D . Compute optimized instances with Amazon Elastic Block Store (Amazon EBS) optimization enabled
Answer: A