How did inventions like the telegraph, steamboat, and railroads affect life in early America?
A) Thomas Edison was responsible for each of these new inventions.
B) These inventions led to increased business productivity and economic growth.
C) Inventions like these caused slavery to spread throughout the United States.
D) These inventions made it possible for new states like Kansas and Missouri to join the Union.

The development of simple stone tools by early hominids led to the ability to procure meat more efficiently. this in turn led to the change in diet that included larger amounts of protein. many scholars believe that this shift in diet was a significant part of how our ancient ancestors adapted so quickly to a varied set of environments, and thus were able to begin cultural development. this demonstrates the intimate connection between