Answer: The discovery was important because it forever changed our understanding or theory of the origins of humankind.
Explanation:
The cast iron was the central piece of construction material during the late 19th century. This architecture style was a famous style especially in the Industrial Revolution<span> era because cast iron was cheap relative to all other materials and that it is as well strong. </span>
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The question ask on which of the following choices where the weaknesses apparent in American society in the late 1800's and the best answer among the choices is letter A.People became too materialistic, C. The economic system didn't work well and D. The government system adjusted to change too alowly.
<span>exporting raw materials and importing
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