The answer is "brought about reform of the meatpacking industry by the government creating and enforcing laws to make it safer and cleaner."
Answer: Sumerians were able to do multiplication and division.
Water vapor is the name of a common greenhouse gas containing only hydrogen and oxygen.
I believe that it was A, they were unprepared and disease rampaged throughout the settlement killing more then the natives or anything else could ever do. Please Mark As Brainliest