On a Linux system, which file$($s$)$ is$/$are modified when a new user is created?

a$./$etc$/$users

b$./$etc$/$password

c$./$etc$/$passwd

d$./$etc$/$accounts

e$./$etc$/$shadow

f$./$etc$/$groups

g$./$etc$/$group

h$./$etc$/$gpasswd

i$./$etc$/$gshadow

j$.$ None of the above