A. user@router# set routing-options static route 0.0.0.0\/0 next-hop 192.168.100.1
B. user@router# set routing-options default route 0.0.0.0\/0 next-hop 192.168.100.1
C. user@router# set forwarding-options static route 0.0.0.0\/0 next-hop 192.168.100.1
D. user@router# set protocols default route 0.0.0.0\/0 next-hop 192.168.100.1
参考答案:A