The correct answer is "sit-ins."
The introduction of iodized salt in the 1920's dramatically<span> reduced rates of goiter</span> in the United States. This rapidly reduced the incidence of iodine deficiency. The United States and Switzerland were the first two countries to introduce the use of iodized salt to their country.
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C. the north wanted to buy imported goods but the south produced cotton so they wanted the north to buy from them.
Many shifted in voting due to racial issues and other political issues depending on the states