Why did large numbers of africans migrate to the americas? a. countries competed over resources during the age of exploration, and many african explorers sailed to the new world in search of riches. b. large numbers of africans were forcibly taken to the americas during the slave trade. c. large numbers of africans came to the americas to find employment and to work on the railroads. d. africans crossed the land bridge from asia to alaska during the ice age. select the best answer from the choices provided. a b c d