What force in society was the civil rights movement of the 1950s and 1960s most trying to overcome?

The force in society that  civil rights movement of the 1950s and 1960s most trying to overcome was: Prejudice

Prejudice refers to a reserved perception or opinion that we have toward a certain type of social group without being based on actual evidence or facts. The civil rights movement of the 1950s and 1960s was made to fight for prejudice that large portion of american people had toward racial minority in both social and professional settings

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.    

i need this answer                                                                 .