What was the stamp act?

a: a british law against charging colonists for postal service
b: a british restriction on colonists moving west
c: a tax the british imposed on the colonies to pay off their debt
d: a means of making colonial post offices profitable

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.