The answer to your question is number 4
The answer that best applies to both the Tang and Song dynasties would be C. A Reliable food production and distribution system. This gave both dynasties the ability to thrive.
Answer
The blues music resides in the element of African-Americans creating their own aesthetic. Blues music represents the opposing voice that refused to be silenced by oppression and segregation.
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A. Natural disasters, such as tsunamis, earthquakes, and floods
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This has resulted from the heterogeneous mix of the countries that are actually participated in. The Iraq and Iran were a member of this organization. There are a lot of concerns regarding the ideology, over the security of the borders, and even the internal security they were bothered by that.
