IBM Long Term File System (LTFS) benefits include which one of the following?（） A: management of the encryption keys B: partitioning of the library drives C: helps to control the write speed matching D: helps reduce tape, file management and archive cost

IBM Long Term File System (LTFS) benefits include which one of the following?（） A: management of the encryption keys  B: partitioning of the library drives  C: helps to control the write speed matching  D: helps reduce tape, file management and archive costs