Ohio, Texas, California, North Carolina, Georgia and New York!
Answer:
North but there was a big factorie in the south call the empire states of the south
Explanation:
the empire states of the south we're responsible for most of the wartime manufacturing
Researchers must utilize a control group in a scientific study because <span>it is important to show that between two groups that were similar from the beginning of the study, the one that received the manipulation is the one that changes. Note that the control group is the group in the experiment that does not receive manipulation by the experimenter and is thus used as basis for how the other test subjects changed. </span>