单项选择题

The Coordinator Surface Search（CSS）in a SAR situation should display by night ______．
A.Deck lights forward and aft
B.A white light over two red lights
C.A red light，white light，and blue light in a vertical line
D.A distinctive signal promulgated by the CSS

A.A.Deck
B.A
C.A
D.A

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The Coordinator Surface Search（CSS）in a SAR situation should display by night ______．A.Deck lights forward and aftB.A white light over two red lightsC.A red light，white light，and blue light in a vertical lineD.A distinctive signal promulgated by the CSS