the answer is C specialization
<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>
Not only destroying the world, but building a new one. We must unite against this evil. This is the start of a new era. The Femininistic age.
On June 13th, the leaders of the colonial forces learned that the British were planning to send troops into Charlestown. In response, 1,200 colonial troops under the command of Col. William Prescott quickly occupied Bunker Hill on the north end of the peninsula and Breed's Hill closer to Boston. By the morning of the 16th, they had constructed a strong redoubt on Breed's Hill and other entrenchments across the peninsula. The next day, the British army under General William Howe, supported by Royal Navy warships, attacked the colonial defenses. The British troops moved up Breeds Hill in perfect battle formations. One of the commanders of the improvised garrison, William Prescott, allegedly encouraged his men to “not fire until you see the whites of their eyes.” Two assaults on the colonial positions were repulsed with significant British casualties; the third and final attack carried the position after the defenders ran out of ammunition. The colonists retreated to Cambridge over Bunker Hill, leaving the British in control of Charlestown but still besieged in Boston. The battle was a tactical victory for the British, but it proved to be a sobering experience, involving more than twice the casualties than the Americans had incurred, including many officers. The battle demonstrated that inexperienced Continental militia could stand up to regular British army troops in battle.