On this two-way out-of-town road, the driver of the vehicle seen in the photograph has placed a single danger pre-signaling device behind his damaged vehicle at a distance of 40 meters . You believe . which is correct ? .
Yes, as long as it is visible from 100 meters by oncoming drivers .
No, because I should have placed it 50 meters away, exactly .
No, because he should have placed two, one in front and one behind, at least 50 meters away and visible from 100 meters .
Correct answer :c
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