Which statement about the primary (default) group of a user is correct?
A. Theprimary groupmembershipof a useris defined in the/etc/gppasswd file.
B. Theprimary groupmembershipof a useris defined in the/etc/shadow file.
C. Theprimary groupmembershipof a useris defined in the/etc/passwd file.
D. Theprimary groupmembershipof a useris defined in the/etc/group file.