Slate is much more commonly found in wet areas, especially around rivers in the United States, so it wouldn't be very available to Natives who were more inland.
the answer is B) natural gas
B Maine was admitted as a free state and slavery was prohibited North of latitude 36°30
Dozens of Serbs were convicted of war crimes because they approved the policy of ethnic cleansing in the war. An ethnic cleansing is when a mass killing of people from different ethnicities or religious group is done. The correct answer is B.