Answer:
During this era, America became more prosperous and saw unprecedented growth in industry and technology. But the Gilded Age had a more sinister side: It was a period where greedy, corrupt industrialists, bankers and politicians enjoyed extraordinary wealth and opulence at the expense of the working class.
Bulls run, battle of Gettysburg
They all are states..that what they have in common..
B - Most Australians work in urban areas
this is the only logical one