The Answers is:
Probably the most important single cause of Byzantine empire collapse was its recurrent debilitating civil war. Three of the worst periods of civil war and internal infighting took place during Byzantine empire decline
According to many historians, the commodities that Egypt supplied to arab traders were copper and Gem stones.
The Sinai Desert was an important route of supplies for Egypt, Arab, and Africa for this particular commodity
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The 1920s industry that had the greatest effect on the economy of the 1920s was the A. automobile industry.
Cars were very important at the time, and remain important even today.
Got trust of scholar bureaucrats, kept most of Chinese government structure, government positions split between Manchu and Chinese, applied Confucian principles in governing (DIDNT TRY TO CHANGE THINGS UP TOO MUCH)