Which of the following is a reason for the growth of cities in the late 1800s?
a. too many people were already living in rural or country areas.
b. the federal government passed the urban act of 1870, which required people to move to cities.
c. the cities offered much more space for people.
d. factory jobs were plentiful and available in the cities.

switch around #3 and #4

explanation:

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one of the main reasons was definitely slavery. back in 1861, republican abraham lincoln was elected and ended up being a major influence in the slavery business. slavery greatly affected the texas economy because back in 1845 during the annexation of texas, slaves became a big part of the texas population. many texans that were in favor of the secession influenced groups through party ties.