urban social programs.Answer only if you know the answer?

Question

Which of these created the greatest need for urban social programs furing the late 1800's.

a.the westward movement of settlers.
b.the influx of immigrants to industrial cities
c. the economica losses resulting from the civil wat
d. the increase in the use of agricultural technology.

Answer 1

Its B. It has to do with poverty and the conditions in the big cities.

Answer 2

(B).