Describe evidence Ivan Van Sertima presents to support his theory that Africans came before Columbus. Include the website link in the answer!

What was true of both richard nixon and ronald reagan? a. they risked their public image by questioning the tactics used in investigating communism in the united states. o b. they led committees to identify people working as spies in the united states. o c. they succeeded in defending themselves against charges of soviet spies. o d. they gained popular support by speaking out against communists in the united states.