Answer:
machines
communication
transportation
new energy sources
increase use of metals and minerals
Explanation:
The dynasty that restored unity to China after Shi Huangdi's government crumbled was the Zhou Dynasty
The best answer is <span>D:The militiamen refused to cross the border into Canada since their military contract did not require them to do so.
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The American militia, while great in number, were ill-disciplined and many contingencies refused to move past American territory into Canada, claiming it was beyond their responsibilities. They generally performed well in their home states and did worse and worse the farther they got from their homes.