The reason why manuscripts were so expensive in the early fifteenth century is because the printing press wasn't invented until 1440, meaning that every individual script had to be written by hand.
What will happen to the countries that do not industrialize is that their economy will fall behind the rest of thw world's economy.
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In the late 1800s, American cities suffered from serious environmental pollution due to the smokestack emissions from hydroelectric power plants. The correct answer is D.
