Dude, there's no question
Answer:
if i see the document, I'd be happy to answer your question :)
I believe it is the 4th because of the fact that the transportation of goods could now be moved a lot faster compared to what it used to be with steamboat or horseback. For example the south could now sell their corn meal to the northern mills a lot faster than before.
No, Christopher Columbus did not go to North America.
