Please answer this is for a test will give badge thingy

Which of the following is a claim about ancient rome that a historian could build san argument around

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.

What championed nationalism and denounced nullification