What caused the now–ghost towns to first be formed?

A. Miners needed to settle in a town.
B. Cowboys needed to settle in a town.
C. Workers in lumber camps needed to settle in a town.
D. All the above reasons caused the towns to first be for

Diego rivera was a famous artist from mexico. most of his paintings were murals. murals are paintings that are made directly on a wall. rivera thought that all people should be able to see beautiful art, not just people who could afford to go to museums. this is why he painted most of his murals on the walls of public buildings