a) The whole was just made up
b) It was just a arab myth that had been around for a while
c) Adam and eve were African and the first humans
d) They were just some humans whose ancestors left Africa and they were the first to inhabit that part of the middle east, hence being the ancestors of the arabs rather then the whole human race.
For me answer d is the most convincing. Also what does Islam say or suggest about when Adam and Eve lived? Also if they were the first humans did their children have to committ incest to pro-create, isn't that sick and wouldn't that have meant most humans would be deformed and and have a very limited gene pool.
I would love to hear all sensible suggestions.
Correct me if I am wrong, but (d) assumes a brother & sister were the first, and only 2, people to inhabit the Middle East.
Because this is less likely, I will go by the same assumption that I have for how God was invented.
Ancient Man thought everything had to come from something, so humans must have been born from the first set of humans and the first set of humans must have been made by God. So will go with (a)