Answer:
D. His improvements allowed the steam engine to run more efficiently on oil instead of coal.
This is a fitting motto for our nation, because the founding fathers had many different views on how the country should be operated and governed. The idea that they were able to reach someone of a general consensus is a testament to the nation's democratic values.
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Answer:
In fact, situations such as these are happening throughout Mexico City, where long-term extraction of groundwater has caused significantland subsidence and associated aquifer-system compaction, which has damaged colonial-era buildings, buckled highways, and disrupted water supply and waste-water drainage.
Explanation:
