The Silk Road trade allowed for diffusion of technologies to go throughout Eurasia. For instance, silk-making technology from China was able to diffuse and reach areas in Europe. Another example would be the religion of Buddhism. Buddhism originated in India and made its way to China along the Roads, and changed a bit along the way.
They were made trustees over the land.
The correct answer is "A".
The "Great Migration" was the massive relocation of African Americans to territories up North, Midwest, and West which occurred from 1916 to 1970. During this period, African Americans who relocated into urban areas in the north were subject to constant violent acts from the White community, as there was still an inherent sentiment of segregation among the citizens of the country. This prompted African Americans to establish in suburbs in the outskirts of the urban areas during the 1950s.