Deck : General Navigation - 222/2138
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| You are approaching a vertical lift bridge. You know the span is fully open when __________. |
| A) a yellow light is illuminated on the bridge pier |
| B) three white lights in a vertical line are lit |
| C) there is a range of green lights under the lift span |
| D) a red light starts to flash at about 60 times a minute |
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