<span>C. the American army</span>
Tropical rainforest, the high mountains and wild rivers were some of the physical obstacles that the Incas faced. They had to build a complex network of roads to link the entire Inca empire. They had messenger stations along these roads so that they could relay their messages, and they built shelters along the way for travelers.
Answer:
Commune, a town in medieval western Europe that acquired self-governing municipal institutions. During the central and later period of the Middle Ages most of the towns west of the Baltic Sea in the north and the Adriatic Sea in the south acquired municipal institutions that have been loosely designated as communal.
