The mobilization of Streetcars and Subways were made possible by
a.
electricity.
c.
radio waves.
b.
internal-combustion engines.
d.
steel.
The mobilization of streetcars and subways were made possible by electricity.
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Asked 11/19/2015 1:25:38 PM
Updated 11/19/2015 1:41:55 PM
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jeifunk [11/19/2015 1:41:55 PM]
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