D. The spread of the Christian Religion after Constantine converted to it
The main reason why cities are an essential part of civilization is because cities allow for the diversification of labor, which lets people specialize in certain trades. This is crucial for expansion.
The Monroe Doctrine had a long lasting impact on the foreign policy of the United States. Presidents throughout history invoked the Monroe Doctrine when intervening in foreign affairs in the Western Hemisphere.
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The Fifth Amendment of the Constitution concerns the right to trial and includes the phrase "No person shall be held to answer for a capital, or otherwise infamous crime, unless on a presentment or indictment of a grand jury". This Amendment, which is part of the Bill of Rights, ensures that Americans can not be held accountable for a crime without a fair and speedy trial involving a grand jury.
Answer:
Salt and Gold
Explanation:
This was often referred to as the GOLD-SALT trade. The West African kingdoms have an abundance of golds.
This is evident in Ghana till the present moment and Mali during the time of Mansa Musa in the 14th century.
On the other hand, the Arab merchants have abundant salt for trading due to their nearness to the sea.
Hence, the right answer, in this case, is the trade was primarily based on SALT and GOLD.
