Which operation is performed by a scale-out NAS cluster when clients send data to the cluster?

Which operation is performed by a scale-out NAS cluster when clients send data to the cluster?
A . Data is divided and stored on multiple nodes in parallel
B . Data is consolidated into a block and then stored on the NAS head
C . Data is evenly distributed to every file system in the cluster
D . NAS file system and cluster grow dynamically to store the data

Answer: A