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Cities were able to expand their geographic areas in the late 19th century because of the development of

A.
skyscrapers.
B.
settlement houses.
C.
assembly lines.
D.
mass transit.

2 Answers

2 votes

Answer:

D.

mass transit.

Step-by-step explanation:

answered
User Duarte Nunes
by
7.6k points
4 votes
I think it is D.mass transit
answered
User Mr Boss
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8.2k points