In the 1880s many people started crowding into large cities so they could get jobs in the factories. What did the cities have to do to limit outbreaks of diseases? (A) They insisted everyone wear masks.
(B) They posted pictures of how to wash your hands in the bathrooms, and cleaned the bathrooms several times a day.
(C) They blocked people from moving into the cities by locking the city gates at night.
(D) They instituted public health and sanitation projects

the dust bowl, otherwise known as the dirty thirties, was a huge dust storm that killed multiple (and i mean  multiple) farmer's crops, leaving them homeless, and foodless, and jobless. in california, there were 5.7 million residents, and the population shrank as mexicans were repatriated. however, when the dustbowl happened, a lot of people began to move to california. by 1940, 250,000 people had arrived. therefore, your answer would be  the population increased, massively.  i hope this !

explanation:

as general terms,  indian territory,  the indian territories, or  indian country  describe an evolving land area set aside by the  united states government  for the relocation of  native americans  who held  aboriginal title  to their land. in general, the tribes ceded land they occupied in exchange for  land grants  in 1803. the concept of an indian territory was an outcome of the 18th- and 19th-century policy of  indian removal. after the  civil war(1861–1865), the policy of the government was one of  assimilation.