9) Which of these would BEST describe the effect that inventions like the telegraph, steamboat, and railroads had
on life in early America?
A)
Inventions like these prevented people from migrating to other parts
of the United States.
B)
These inventions led to increased business productivity and economic
growth.
Inventions like these caused slavery to spread throughout the United
States.
C)
D
These inventions made it possible for new states like Kansas and
Missouri to join the Union.