There were millions of people who moved into new york city in the late 1800s. how could millions of people live and work in such a tight space?
a. the city built skyscrapers and the brooklyn bridge allowed people to live outside manhattan
b. people could only hold jobs for a certain amount of time before they had to move
c. they started to make homes and factories underground
d. there was a limit on how many children each family could have to control population