When is it permissible to turn left on a green light?

Answer: C — When cross traffic and turning traffic permit

Turning left on a green light is permissible when cross traffic and turning traffic permit it because this ensures safety and compliance with traffic rules. A green light indicates that you may proceed, but it does not guarantee that the intersection is clear or that it is safe to turn. It is vital to pay attention to the actions of other vehicles and pedestrians before making the turn. This includes assessing the speed and proximity of oncoming vehicles, as well as watching for pedestrians crossing the intersection. The requirement to yield to cross traffic and assess the overall situation helps prevent accidents and ensures that drivers remain aware of their surroundings. Being cautious in these scenarios is a fundamental aspect of safe driving practices.