The correct answer is A. They had elaborate trade networks.
Explanation
Trade networks are a form of the economic relationship between human communities in which products or services are exchanged for other goods or services or exchange currency. With the arrival of the Europeans in America, it was discovered that the native communities had a very elaborate network of commercial relations that allowed them to exchange their products with the other tribes in different parts of the wide American territory, from where they could obtain different products such as sea fish, river fish, the meat of domesticated animals, fruits, and other products of agriculture. So, the correct answer is A. They had elaborate trade networks.
The answer is : Communist insurgent
Henry Comstock<span> was an American miner after whom the </span>Comstock<span> Lode was named after</span>
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<span>What was not a reason for the decline and fall of the Tang Dynasty? Mongol invasion
By the middle of the eighth century, the Tang power had declined. The internal economic instability and subsequent rebellion of An Lushan marked the beginning of the military decline for the Tang empire: "The appreciable system of land distribution, which characterized the early years, disappeared and the peasants, who previously supported the military by paying Forced to move and fight in the border areas, and increasingly, the resources fell to the army's caudillos, who achieved great independence from the central government and greater control of the economy. "An Lushan, commander of three Military regions, favored by the court, revolted against the empire (755-763) and seized Luoyang and Chang'an, beginning with his revolt the definitive decay of central power and dynasty.
The military defeat in 751 by the Arabs in the Talas battle marked the end of the Tang authority in Central Asia.
Finally, bad government, court intrigues, economic exploitation and popular revolts weakened the empire, allowed military chief Zhu Wen to seize the throne to found his own dynasty in 907. Thus, a new Period of fragmentation in the history of China: The period of the Five Dynasties and the Ten Realms.</span>
