SAT US History Practice Question

Which of the following developments is NOT associated with the Gilded Age?

1. A.Relations between workers and owners became increasingly contentious.
2. B.African Americans' migration to industrial cities led to "white flight."
3. C.New inventions made communication between cities easier.
4. D.Many industries came to be dominated by a small number of large companies.
5. E.Corruption in politics became more public and widespread.