Which sentence would best resolve this series of events in a descriptive narrative

i think it would be a

this act gave the federal government the power to relocate any native in the east to territory west of the mississippi river.

the answer is   b. coronado.

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.