Study the map. What physical features did the Maya use to trade jade and obsidian with their neighbors living on the Mexican Plateau? They used a river and the ocean.
They used a river and the ocean.
They used land and a river.
They used land.

Which statement about submarine use in world war i is true? the allies never found a way to counter german submarine warfare. germany’s use of submarines affected the united states’ decision to enter the war. only the germans used submarines in world war i.