During the 19th century, the United States ability to remain isolated from European affairs was largely due to its
a. lack of cultural identity.
b. economic instability.
c. political instability.
d. geographic location.

Respuesta :

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".