What new technology was spawned by westward expansion?

lying without the limits of the several states; and may permit them, at such times, and in such manner as it

for hobos it was a very hard time most hid on the sides of the railroad tracks causing people to get bulls and get them off sometimes causing in fatal death they couldnt get people to give them money because the   people were also in need of money

b) almost one million irish people died during the potato famine.

i think the answer is d