c - That answer is incorrect
Let me give you a brief lesson in astrology. Pluto is the furthest planet from the sun. It is quite a few million miles from earth (hey, I never said I had a degree or anything! Just accept it and move on) and last I checked you couldn't see it without some kind of telescope. How on earth could you confuse this with a UFO. Now you didn't even need to watch this episode (one of the best I might add) to know this. I can only assume that you are an moron.