"Many different cultures mixing within the United States" would be the best option from the list since it shows cultural diffusion, but a better answer would be something along the lines of people all across the world eating McDonalds or something along those lines.
The domino theory was a theory prominent from the 1950s to the 1980s, that speculated that if one country in a region came under the influence of communism, then the surrounding countries would follow in a domino effect. The domino theory was used by successive United States administrations during the Cold War to justify the need for American intervention around the world.
A. the movement away from home production - <em>true, because factories produced products faster and cheaper so more people could afford them</em>
b. poorer quality of iron - <em>false</em>
c. the need for more power - <em>true, because machines ran on power, so they needed a constant supply</em>
<span>d. increased exports of British cotton goods - <em>true, because they were able to produce more cotton goods and therefore there was a surplus to sell
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Answer: (b)