网络yum源的配置中，想要开机自动挂载镜像，可在/etc/fstab键入以下哪条命令（）？
A.$cat/etc/redhatrelease redhatenterpriselinuxserverrelease7.1(maipo) B.vim/etc/yum.repos.d/rhel-dv C.repo b/aseurl=http://本地主机IP/yumsource D./ios/rhel-server-7.1-x86_64dv E.isovar/www/html/yumsourceiso99460ro,relatiom正确答案C
