Blacks "live within two concentric circles of segregation" means

King stated this, he believed that black people were located at the bottom of the economic ladder. Their two circles of segregation were one that kept them prisoner based on their skin color while the other held them prisoner in poverty and deprivation. The average black person struggles to escape his circumstances but is hindered by these factors. He receives no normal education and no normal social or economic opportunities. When he attempts to try to better himself, he is told to lift himself up on his own by bis bootstraps, advice that is senseless considering he is often barefoot.

only b 

The direction a chemical reaction occurs is represented by an arrow