The answer is when teachers began to start educating and training their students at school! I hope this helped :D
The correct answers are B) salt was used as a form of currency and D) salt was used to preserve food.
<em>The two factors that explain why salt was so valuable to West Africans are salt was used as a form of currency and salt was used to preserve food.
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Salt for West Africans was of the utmost importance. It served as a currency that allowed themto trade gold for salt. Yes, salt was a necessary element for people to survive because salt was used to preserve food. West Africans knew how to find grains of salt from the river beds after rainfall. People from the North of Africa had abundant gold, but no salt. So they often traded gold for salt with Western Africans. So the two factors that explain why salt was so valuable to West Africans are salt was used as a form of currency and salt was used to preserve food.
The best and most correct answers among the choices provided by the question are the following
<span> 1. The slave trade was ended in the North. Missouri was admitted as a slave state.
2. Popular sovereignty was established for New Mexico and Utah.
3. California was admitted as a free state.
4. A stringent fugitive slave law was passed Slaves would be freed if they went into the Northeastern states.
5. The slave trade was outlawed in the District of Columbia.</span>
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