PLEASE HELP NEED IN YOUR OWN WORDS which goal of the preamble do you think it’s important? Why?

sense of self-interest

immigrants from northern and western europe continued coming as they had for three centuries, but in decreasing numbers

idk

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.