What effect does enabling GNA on an Isilon node pool have for SSDs?

A.
Allows node pools without SSDs to use SSDs in other node pools for metadata read
acceleration

B.
Allows SSDs in the same node pool as the data to be used for metadata read
acceleration

C.
Allows SSDs in all node pools to be used as L3 cache and shared between node pools

D.
Enables cluster-wide read/write metadata acceleration utilizing all SSDs