Car A = light and travels at 100 mph. Car B is stationary. Car C travels at 50 mph. How does car C see car A traveling away from it at 100 mph the same as car B sees car A traveling away from it at 100 mph? There is only one logical answer, the rest are just misdirection and falsehoods. An no answer is no answer and does not solve the equation which just proves there is only one answer