What is the rule created by the road markings in this situation?

Your answer is correct because the road markings are designed to make drivers approach the junction cautiously. In German traffic rules, such markings usually indicate that you must slow down and be prepared to yield, but not necessarily stop unless there is conflicting traffic. The markings serve as a warning to pay attention, check for other vehicles or pedestrians, and proceed carefully only when it is safe. Stopping is only required if there is a yield sign or if another vehicle has the right of way. Therefore, the correct rule here is to approach the junction cautiously, being ready to give way if necessary. This helps ensure safety without causing unnecessary stops.