B would be the answer because they were mapping the Mississippi river.
Well, people started specializing in things and if they couldn't get something because they didn't know how to make it, they would trade for it. Fast forward 8000 years, companies like Coca Cola make coke and fanta and others can't make it because they're specialized for it. They trade for it with the entire world and other companies make things that Coca Cola owners buy.
Answer:
A essay on Harriett Tubman or Fredrick Douglas is written below in details.
Explanation:
Comparing Fredrick Douglass and Harriet Tubman, Harriet Tubman and Frederick Douglass are notable African American civil rights personalities who fled from slavery. The civil rights activists spent an important moment of their presence struggling against slavery and promoting social equity thus containing outstanding positions in American archives.
