Which of the following statements is true regarding eCryptfs?

A.
For every file in an eCryptfs directory there exists a corresponding file that contains the encrypted content.

B.
The content of all files in an eCryptfs directory is stored in an archive file similar to a tar file with an additional index to improve performance.

C.
After unmounting an eCryptfs directory, the directory hierarchy and the original file names are still visible, although, it is not possible to view the contents of the
files.

D.
When a user changes his login password, the contents of his eCryptfs home directory has to be re-encrypted using his new login password.

E.
eCryptfs cannot be used to encrypt only directories that are the home directory of a regular Linux user.

Explanation:
https://help.ubuntu.com/lts/serverguide/ecryptfs.html