Final answer:
A yellow buoy under the U.S. Aids to Navigation System can mark a fish net area, be lighted with a white light, or show a fixed red light; hence, all of the statements are correct.
Step-by-step explanation:
Under the U.S. Aids to Navigation System, a yellow buoy may mark a fish net area, be lighted with a white light, or show a fixed red light.
Therefore, the correct answer is D. all of the above. Yellow buoys are special purpose aids to navigation and can serve a variety of functions such as indicating the presence of pipelines, traffic separations, or spoil areas.
Mariners should refer to the local nautical charts and other boating guides for specific information regarding the meanings of yellow buoys in their area of navigation.