Final answer:
A flashing yellow arrow signal allows drivers to turn in the direction of the arrow after yielding to oncoming traffic and pedestrians.
Step-by-step explanation:
A flashing yellow arrow signal means option (D): You may turn in the direction of the arrow but only after you yield to approaching vehicles. It's an alert to be cautious on the roadways, indicating that while turns are permitted, you must first make sure that the path is clear and it is safe to proceed. The oncoming traffic has the right of way, and drivers waiting to turn must allow all oncoming vehicles and pedestrians to pass before completing the turn.
A flashing yellow arrow signal indicates that you may turn in the direction of the arrow, but only after you yield to approaching vehicles. This means that you have the right of way to make the turn, but you need to be cautious and give way to any oncoming traffic before proceeding.