Which statements is true concerning Oracle Linux configuration files for users and groups?

Which statements is true concerning Oracle Linux configuration files for users and groups?

A.
The /etc/passwd file contains hashed passwords for each user.

B.
The /etc/shadow file contains hashed passwords for each user.

C.
The GECOS field in /etc/passwd file may be empty.

D.
The /etc/group file contains the group name and the hashed group password.

Explanation:
/etc/shadow file stores actual password in encrypted (one-way hashed) format for
user’s account with additional properties related to user password i.e. it stores secure user
account information