Which of the following should the permission settings be for /etc/passwd and /etc/shadow?

A.
/etc/passwd: -rw-r–r– /etc/shadow: -r——–

B.
/etc/passwd: -r——– /etc/shadow: -rw-r–r–

C.
/etc/passwd: -rw-r–r– /etc/shadow: -rw-r–r–

D.
/etc/passwd: -r——– /etc/shadow: -r——–}