What is an accurate statement about variable prefetching?

A. Many blocks that have recently been written to storage by the compute system are retrieved and placed in cache.
B. Many non-contiguous blocks that are not currently required can be retrieved from cache in advance.
C. Storage system prefetches data in multiples of the original I/O request size from the compute system.

D. Storage system prefetches many non-contiguous blocks of data, with varied sizes, from cache.