Hm..history questions like this are my weak point but i would probably say the reserve requirement?
Answer:
Segregation in America. Or the reconstruction era after the american civil war
Explanation:
Right after slavery was abolished in 1865(ish) Jim Crow laws, Separate but equal ruling in plessy v. Ferguson
The answer to your question is C.
Answer:
ok dr Luther king wanted to create a allusion about stopping slavery so that the audience will get a mind set that slavery is a illegal and the allusion will always remind people that 100 years have passed since the emancipation proclamation.