what kind of clues do historians look for and what is the correct name for these clues

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When the united states entered world war ii it affect the lives of americans in many ways people were asked to such as food oil and gas the government awesome cars to purchase a to the country financially during the war more more working in all industries during the war

How was the cottage industry different from the factory system? products were made quickly and cheaply. products were made by machines. products were crafted by people with years of training. o products were made on a large scale.

What deadly disease cost many workers their lives before dr. william gorgas found a treatment?