【单选题】
Which command prompt indicates that you are in operational mode?()
A、user@router&
B、user@router#
C、user@router%
D、user@router>
A、user@router&
B、user@router#
C、user@router%
D、user@router>
A、[edit chassis]user@router# B、[edit]user@router# C、[edit system] user@router# D、user@router>