Test Unit Test
Active
TIME REMAINING
01:30:24
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The replacement of iron with steel in the late 19th century was responsible for the building of the first
skyscrapers.
O True
O False

true

Explanation:

The replacement of iron with steel in the late 19th century was responsible for the building of the first

die.

explanation:

switch around #3 and #4

explanation:

i hope this , im not 100% on this i really hoped this