How did reconstruction affect race relations in the united states

Today, as a result of extensive new research and profound changes in American race relations, historians view Reconstruction far more favorably, as a time of genuine progress for former slaves and the South

answer; i believe that the correct answer is (tabula rasa);

by using  production possibilities graph.  opportunity costs are key expenses in financial matters and are utilized as a part of registering money saving advantage investigation of a venture. such expenses, be that as it may, are not recorded in the record books but rather are perceived in basic leadership by processing the money costs and their subsequent benefit or misfortune.