>>718891584
Ironically enough for a Bfag, the Portal 2 ending speaks to A being correct even though it makes no sense. I'll make it very easy for you since you seem to be completely fucking retarded. If the moon is moving at 2000 mph parallel to the surface of the earth (aka the surface of the moon since they're tidally locked), Chell would emerge sideways going 2000 mph and get launched off the surface of the moon (and not even pick up orbit due to weak gravity). Additionally, the acceleration shoving Chell backwards out of the portal due to pressure differential would be calculated as follows. Assuming Chell's projected area is 0.5 m^2 and her mass is approx 60 kg. 1 atm = 101325 Pa. The force she sustains is 50662 N. Meaning her acceleration as she gets sucked towards the portal is approximately 844 m/s^2.

It's not B because of Portal 2's ending, it's B because of conservation of momentum.