The completion of the first transcontinental railroad in 1869 encouraged settlement of the American west by proving easier travel and it took less time.
The answer is A support for other nations lollll
You didn't include options but here's the jist - there were many casualties, cities and towns were left in ruins, national identities across Europe were in shambles.
They both wanted to solve the nations problems in conquest.
The answer would be B.
"A" would make no sense since this was after the war.
"C" would also make no sense cause there is no nuclear base on the moon.
"D" another planet can't be claimed as Territory.
