I really really need help! While rural nobles rose to power through their control of land, the urban leaders of the city-states built their wealth through trade as what?

As with any small island country, cuba has fewer natural resources than countries such as brazil. this affects their economy in that cuba a) exports only manufactured products. b) exports more products than it imports.. c) must import more products than it exports. d) has imposed trade barriers against the united states.

Brainliest to who answers! what will always cause a supply curve to shift to the left?

In exchange for land, a knight agrees to be a sort of sub-vassal to a vassal. this agreement was known as: investiture homage tyranny subinfeudation