Answer: The answer should be c
the answer is:
c) they were all military leaders during the revolutionary war
I think that the best answer is the geographic location: many other countries (Sweden for example) have tried being neutral at different times but did not manage to: but the fact that the US has only two boundaries, and that both other countries also have a history of fighting from independence from a European power, makes it possible that unless US decideds to get involved in international politics, it can be "left alone".
I would say it is false that t<span>he need to keep records of taxes led to the development of a written number system, if this is a true/false question.</span>
