As a pedestrian, when should you not enter the street or crosswalk?

Answer: B — When there are vehicles approaching closely.

As a pedestrian, it is essential to prioritize safety when considering crossing the street or entering a crosswalk. The correct choice emphasizes the importance of being aware of your surroundings, particularly the presence of approaching vehicles. When vehicles are coming closely, it significantly increases the risk of an accident. Pedestrians should always wait for vehicles to pass and ensure they have a clear path before entering the roadway or crosswalk, thereby protecting themselves from potential harm. Other options suggest scenarios where safety might not be adequately considered. Being in a crosswalk does not automatically guarantee safety if vehicles are approaching. Convenience and personal feelings of safety can also lead to poor decisions if there are other traffic factors in play, highlighting that pedestrians must prioritize situational awareness over convenience or subjective feelings.