What economic advantage did the north have over the south in the early 1800s?
a) immigrants from europe settled primarily in the south, taking jobs and causing financial hardships.
b) large-scale agricultural plantations opened in the north, giving the south competition in the markets.
c) northern businesses did not rely on raw materials as much as southern plantations did.
d) northern industries, such as manufacturing and shipping, benefited from the cheap southern materials and exporting their own goods.

D) Northern industries, such as manufacturing and shipping, benefited from the cheap southern materials and exporting their own goods.

Explanation:

Since the early colonial period the north created mainly a manufacturing economy.  This had to do with the natural resources they had available, but also the weather conditions in the area.  The cold temperatures made large-scale plantations impossible.  The north had an abundance of timber and began to exploit the resource.  They also established important ports for sea trade which continued to be used during the 1800s and beyond.  Eventually they created an industrialized economy that manufactured goods based on raw materials from the south, and exported the finished products to the rest of the country and even Europe.

answer: the time zones used to be whatever the local authority wanted them to be. one town might have 6am whenever the sun came up and another town had 6am 10 minutes later.  

the trains had a hard time when their orders said to be at a certain point at 6am.  

6am, but who's 6am.  

the railroads got together and set the time zones more or less along the longitude lines across the country.

explanation: