D. Citizens are free to elect anyone they want into office
You would get -3 because:
-9x5 is -45 +45 you get 0 and your left with -3
They located in an area that traders could reach in a single season.
Your correct answer is C. The mystery of nature
I would argue that the primary difference was the introduction of nuclear weapons after WWII--meaning that the spread of communism could actually take over the world as opposed to just causing unrest in the US.