How did railroads affect American's economy in the 1800s

The railroad allowed raw materials to reach factories in the East and consumer goods to reach all parts of the United States in a timely manner. Railroads helped to create the cattle industry on the Plains immediately after the Civil War. Cattle brought low prices in Texas, but demand was higher on the East coast.

Explanation:

i only have part a but here is the first one: - lewis and clark are born

- lewis marries sacajawea and clark is jealous  

- clark drowns lewis and then goes to jail

where is the passage