You made an account for brainy. That’s your most interesting discovery.
I think it's A but here's an explanation anyway: as you heat the crude oil, the different hydrocarbons, having different boiling points, boil and evaporate up the column. Those with lower boiling points, shorter in chain length, will condense nearer the top of the fractional distillation column. Those that are more viscous, larger in chain size, will have high boiling points, so will evaporate last and condense lower down in the column. Therefore, you achieve all the different oils / materials (oil, petrol, gasoline, tar etc etc). I hope this helps. If not, then a good website to use is 'BBC bitesize, fractional distillation'.
Mountains and high places such as cliffs in front of oceans could be good for defense because you have the high ground and an easier to attack ships.
Ground that is very fertile and has enough access to sun could prove very good to plant crops and make farms.
Rivers and lakes could come off of a mountain so being on lower ground could be good to provide water for yourselves and your crops or animals that are used for food.
Idaho had good soil for potatoes and farming. Towns with lakes and hills would be good for water and farming and life with a family in general.
You would want to avoid rocky ground and mountains unless you wanted to protect yourself, so avoiding new england and also high places like colorado.
