According to Oakes, what was Lincoln’s strategy in convincing the white North that emancipation was good?

a) Lincoln told a group of black delegates that the freed slaves should be prepared to work for cheaper wages than white free-laborers.

b) Lincoln told a group of black delegates that the freed slaves would be better off if they left the United States.

c) Lincoln told a group of black delegates that freed slaves had the right to confiscate the lands of their formal masters.

d) Lincoln told a group of black delegates that the federal government would compensate masters for the loss of their slaves.