What was one of the major resources that was exchanged among lords, vassals, and serfs under feudalism?

a. money
b. authority
c. land
d. protection

In some african american communities, unemployment was as high as percent.

Which describes a contribution from classical rome to modern western civilization? a. international gathering to celebrate sporting achievement b. written constitution based on natural rights c. large infrastructure projects to benefit the public d. direct election of the ruler by all residents of the empire

World war 2 was caused, in part, by which of these factors?