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单选题
A bridge over a navigable waterway is being repaired. There is a traveller platform under the bridge’s deck that significantly reduces the vertical clearance. If required by the CG district commander,how will this be indicated at night?()
A

Illumination by flood lights

B

A quick flashing red light at each lower corner

C

A strobe light visible both up and downstream

D

Fixed amber lights under the extreme outer edges of the traveller


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