linux系统中，使用（）位表示文件的类型与权限

A./etc/passwd
B./etc/rpasswd.conf
C./etc/bash.bashrc
D./etc/login.defs

A.HA
B.vMotion
C.vSphere Replication
D.FT

A./var/log/httpd
B./usr/log/httpd
C./sbin/log/httpd
D./etc/log/httpd