Lincoln's "10 percent plan" dealt with
a) his idea for instituting an income tax.
b) how to draft more men into the union army.
c) re-admitting southern states into the union.
d) his quest to reconquer only 10% of the south.

At the time of the brown v. board of education decision, schools were segregated everywhere in the country. several states had laws requiring segregated schools. schools in nearly every state has been desegregated. segregation was common in the north, but not in the south.