Which options are correct with ACK's distributed data cache?

Which options are correct with ACK’s distributed data cache?

Which options are correct with ACK’s distributed data cache?
A . Accelerate remote data reading for Al training jobs, reduce GPU/CPU waiting time
B . Supports different storage backends including OSS/HDFS/NAS
C . Multiple cache layers including RAM/SSD/HDD
D . Supports preload once, read by many jobs
E . Supports Horizontal scaling

Answer: A,B,C,D,E