Obligatory alternative means that although the perpetrator has committed an illegal act and caused a result, even if he complies with the law, the result cannot be avoided. Based on the above definitions, the following optional actions are:. ['A is driving normally, and pedestrian Wang rushes towards A from the sidewalk, but Wang is injured.', 'Yi drunk and drove. Pedestrian Wang was also drunk and rushed towards B from the sidewalk. As a result, Wang was injured.', 'C driving at high speed, pedestrian Wang crossed the road, C was too late to brake, and Wang was injured.', 'Ding was driving overloaded, and pedestrian Wang crossed the road. Fortunately, Ding made an emergency brake and did not hit Wang.']