On a road outside the town, with one lane for each direction, what separation should you leave with the vehicle that precedes you, which you do not intend to overtake, if you are driving a group of vehicles less than 10 meters long ?
The one that allows me to stop the vehicle in the event of sudden braking of the one in front without colliding with it .
The one that allows me to stop the vehicle in the event of sudden braking of the one in front without colliding with it and, in turn, allows the one who is behind to overtake me .
The one that allows me to observe the traffic ahead .