As shown in the picture, when a vehicle breaks down on an expressway and cannot move, a warning sign should be placed 150 meters ahead of the vehicle.

ANSWER · B

According to the "Road Traffic Safety Law", when a vehicle breaks down on an expressway, follow the relevant rules. Place warning signs 150 meters away in the direction of oncoming traffic, and have occupants move to the right shoulder or emergency lane immediately and call the police promptly.

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