Six:
1. Upper Mississippi
2. Arkanas River
3. Illinois River
4. Missouri River
5. Ohio River.
6. Red River
Plessy v Ferguson was a landmark case and was a United States Supreme Court decision to uphold the laws that kept segregation, under the phrase "separate but equal". This regarded public facilities for the most part including buses, bathrooms and water fountains. This was brought from the Committee of Citizens in New Orleans, so this was applied across the board in Louisiana.
Answer:
It's too long yr mark my answer as branily dear
18 States - North Carolina, Ohio, Alabama, Connecticut, New York, Georgia, Kentucky, Maine, Maryland, Massachusetts, Tennessee, New Jersey, New Hampshire, Pennsylvania, South Carolina, Vermont, West Virginia, and Virginia. The Appalachain mountains are found in these states, so it is only logical sediments could be found inside of them.
The answer is A :) Hope I helped <3