Which of these factors contributed most to US westward expansion in the second half of the nineteenth century?

A.
improved overland trails
B.
development of more railroad systems
C.
peace treaties with American Indians
D.
discovery of gold in Alaska

Which was not a primary goal of reconstruction

The supreme court serves what important function in the u.s. federalgovernment?

Why was galileo galilei brought before the inquisition? for insisting that earth stands still at the center of the universe for proving that planets move in elliptical orbits for putting forth evidence that earth moves around the sun for suggesting that the sun is a star