The nickname for U.S. soldiers in WW1 was known as "doughboys". There are many explanations for the nickname for the soldiers but the most common was that their uniforms would be coated with dust, so that they looked like they were made out of dough, or perhaps of adobe.
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What led to the outbreak of the bloodiest conflict in the history of North America? A common explanation is that the Civil War was fought over the moral issue of slavery. In fact, it was the economics of slavery and political control of that system that was central to the conflict.
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The correct answer would be, The most important trait of public goods is that they are non exclude-able and nonrivalrous.
Explanation:
Public goods are the goods that are provided by the government of a country for the general public of that country and each and every person of the country can use those goods. The most common examples of public goods are rides in parks, benches, shades of trees, public washrooms, public recreational parks, etc.
The public goods are non exclude-able and nonrivalrous because no one can be excluded from using these goods and the use of these goods by one cannot reduce the availability of it for the others.