The classification of air mass types is based on which parameter?
a) amount of snow or rainfall
b) source region
c) temperature extremes they cause
d) distance traveled
e) moisture content

B. from where ye belong, lol. xd

The higher you go up the less oxygen there is 

It might. it might because if you think about if they discovered if we came from (lets say something funny like aliens) and thy found cells that matched and they would have t do more research about it but would most probably change their theory.