Which of these was a mayan achievement? a. advanced understanding of astronomy b. writing and math skills c. farming on hillsides and in swamps d. all of the above

What areas were the focus of disagreement between the united states and the soviet union?

Why did jefferson make the louisiana purchase?

Which impact did the civil war have on the spread of disease in texas a. disease decreased bc people left the area to fight in the war b. disease increased bc medicine was in short supply. c. disease increased bc many new diseases were brought to the area d. disease decreased bc confederate doctors distribute new medicines to local communities