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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.

User Nikita Ag
by
7.9k points

2 Answers

2 votes

Answer:

D.

mass transit.

Step-by-step explanation:

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