Please be 100% sure

Which of the following statements is true? You may select more than one. Question 13 options:

A) Some file systems encrypt only files. Others encrypt files and metadata.

B) File systems that use full disk compression always use fewer bytes to store files than file systems that do not use full disk compression.

C) Journaling file systems keep a record of recent operations and may store multiple versions of the same file.

D) Transactional file systems group several file system operations together and guarantee all grouped operations in a transaction are committed or all are aborted.