What applies in the area 15 m in front of and behind this traffic sign?

You answered correctly because this sign marks a bus or tram stop. According to German traffic rules, within 15 meters in front of and behind this sign, you must not stop your vehicle except briefly to let passengers board or alight (answer 1). Additionally, you must ensure that you do not obstruct passengers from getting on or off the bus or tram (answer 2). Parking (answer 3) is not allowed in this zone, as it would block the stop and hinder public transportation. Understanding this helps ensure smooth and safe public transport operation.