What is the right course of action?

In this situation, the traffic rules relevant to right of way are critical for safe driving. When deciding how to proceed, consider that the red car has the right of way if it is traveling straight and is not required to yield to any other vehicles. The blue car, on the other hand, has to yield to the red car if it is turning and the red car is coming straight.

By selecting both "I have to allow the right of way to the red car" and "I have right of way ahead of the blue car," you demonstrated an understanding of the priority of right of way based on direction and path of travel, as outlined in German traffic regulations. Always ensure to correctly identify which vehicle has the right of way to prevent accidents and ensure safety on the road.