An Architect Is Designing a Solution for a New Customer

An architect is designing a solution for a new customer. The customer is going to use the cluster to store a large number of files that will be accessed by many users. What IO optimization should be used and what kind of prefetching will take place?

A) Concurrency, aggressive prefetching
B) Random, aggressive prefetching
C) Concurrency, moderate prefetching
D) Concurrency, no prefetching