<span>The Soviet Union, is the correct answer</span>
Through multiple revolutions people have adapted to and affected their environments. As civilizations settled, new advances in agriculture and tools were made to allow for a less-nomadic society. Through advances such as iron tools and food stock, civilizations settled creating the basis for large empires to come later. Also through the innovation of weapons and armor, empires were able to better control and defend larger territory allowing for exponential expansion. Finally, with new advances made by different civilizations, trade increased as demand for new products from other empires grew.
The Louisiana Purchase, which was actually made by Jefferson himself, was a shift in his general principles because it required great power on behalf of the federal government, which Jefferson himself didn't like. The same goes for the Monroe Doctrine.
I believe you are correct. The answer is A) the 38th parallel.
Hope this can help.
