Final answer:
The best approximation of Edward's current position relative to the ocean surface is 11 meters below the surface.
Step-by-step explanation:
To determine Edward's current position relative to the ocean surface, we need to calculate the net displacement by considering the changes in depth. Edward initially stops 14.3 m below the surface, then swims down 5.8 m, and finally swims up 3.2 m. So, the net displacement is 14.3 m - 5.8 m + 3.2 m = 11.7 m.
Therefore, the best approximation of Edward's current position relative to the ocean surface is approximately 11 meters below the surface (B).