When making a U-turn at an intersection, it is important to:

Answer: A — Make sure the turn can be made without crossing a median

When making a U-turn at an intersection, it is important to make sure the turn can be made without crossing a median. This is because crossing a median is both dangerous and generally illegal. Option B is incorrect because making a U-turn involves reversing direction, while making a regular turn does not. Flashing your high beams, as mentioned in option C, is not a necessary step in making a U-turn and can potentially blind or distract other drivers. Lastly, stopping in the center of the intersection, as stated in option D, can cause traffic congestion and is also illegal in most places.