B! The main goal was to keep slavery out of all western lands
Absolute states has solid political stability which is very favorable for business and peace at time. However,usually unless the absolute ruler is enlightened, the disadvantages by far surpasses the advantages. Usually, liberties and rights are the first casualty of such a type of rule. The other problem is the excesses of a sovereign who may chose to rule in total disregard of the rule of law.
It was the work with the railroads have a nice day sir/maam
Because more factories were made in new england states during colonial times and which meant they had more developed factories, and many immigrants were moving to America during this era (particularly New York.)