I did this yesterday the answer was A
Answer:
Transcontinental Railroad workers
Mining
Farming
Explanation:
Transcontinental Railroad workers resulted in growth
Mining, copper, lead, tin, quartz, & zinc ultimately more profitable than gold or silver. Corporations gradually came to dominate mining
Farming, cattle raising, Land given away to encourage settlement of West and to develop the family farm.
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The United States responded by pushing a resolution through the U.N.’s Security Council calling for military assistance to South Korea.
a model of the Solar System in which the Earth and planets revolved around the Sun,