In 7th century A.D modern day Saudi Arabia.
A:water pollution in the river Thames
FYI: This occurred in London, in July and August
Demographics is statistical data of a population. This can include how many people of each gender in a certain population, the occupations of the people, and basically anything that is statistical data.
There are no answer choices, but I know a Native American tribe that was <em>not</em> located in Mesoamerica was the Incas.
D is the answer the south did lose slaves and a useful currency and an organization called the freedmen's bureau was formed however cotton production did not stop
