You should never attempt a left turn at an intersection if?

Answer: D — All of the above

At an intersection, it is important to have enough room and clear visibility to safely make a left turn. If you do not have enough room, you may risk causing a collision with other vehicles. If your headlights are off, you may not be able to see oncoming traffic or pedestrians clearly, increasing the chances of an accident. And if you cannot see clearly, whether due to poor weather conditions or obstructions on the road, attempting a left turn could be dangerous. Therefore, the correct answer is D, as all of these factors must be taken into consideration before attempting a left turn at an intersection.