When a Client Requests a File to Read from an Isilon

When a client requests a file to read from an Isilon cluster, in which order does the read operation access the hardware in a node?

A) Endurant Cache, L1 cache, disk
B) L2 cache, L1 cache, disk
C) Disk, L2 cache, Endurant Cache
D) L1 cache, L2 cache, disk