What caused Spain's and Portugal's demands for African slaves to grow?
A. the development of cotton plantations in the New World
B. the need for cheap labor in Europe
C. the development of sugar plantations in the New World
D. the need for cheap labor at sea
I suppose the C is right, because at that time,Spain and Portugal take advantage of slave and cane to be rich, they buy the black people from African to plant sugar cane.
