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odware
which of the following were changes amerka experienced during the second half of the nineteenth century?
the industrial revolution
major technological advances
an agricultural revolution
changes in education
a war with great britain
question 16 multiple choice
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hello,

your answer whould be d

explanation:

the addition to geographic boundaries that might have  kept the people of the huang river civilization from traveling to far distance region is that they had learned about the other river valley civilizations but feared contact would bring invasion.

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b europeans take corn to africa. corn becomes an important crop there.