What fixed the issue of political machines

This law states that the "chinese laborers to this country endanger the good order of certain localities" in the united states. which of these would represent a "locality" that would most likely have wanted this law created and passed? a) dallas b) chicago c) atlanta d) san francisco

The articles of confederation allowed congress to: make and borrow money. declare war. create a postal service. all of these choices are correct.

Who did the first work in creating vaccines