As the territories of America grew, the rigid terrain and great distances caused for a change in transporting goods. What connected these areas making travel and trade much more efficient?

sorry i need poitns hopem yy yy y y y y y y y y y y  yy y y y y y  y y y y yExplanation:

this is a good question! i'll do some research and come back when i have the answer!

can someone me with this question:  

1) the end of the conflict between the north and the south didn’t just mark the end of a war; it marked the end of an entire way of life.” which statement best describes what this statement means?  

a) the southerners were no longer free and were controlled by the northern states.

b) the industrial economy in the north was not sustainable.

c) slavery became illegal, which changed completely the south’s labor force and the agricultural economy was destroyed.

d) the states decided to relinquish their independence and return to britain’s rule.