which group of immigrants was officially not allowed into the united states according to the federal "exclusion" act in the the late 1800s A. the Russians B. the Japanese C. the Mexicans D. the chinese

How did inca develop their road system? a) they used mortar to hold the stones together. b) they built suspension bridges over rivers. c) they mixed copper and stone together to make the blocks. d) they laid roads in the cities, not in the less densely populated deserts.