A large number of people move up the social class ladder, a large number move down, and the social class system shows little change in exchange mobility.
Social mobility is the movement of a person's social position from one to another. The shift could be greater, lower, intergenerational, or intragenerational, and it's not always possible to tell whether it's for the better or worse.
Exchange mobility shows that society is divided into classes, and that these classes keep their population levels largely constant. If a certain number of people shift from the middle class to the upper class, an equal number is anticipated to go in the opposite direction.
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B) it had easy access to Aisa, the Black sea, the Mediterranean sea and rhe Danube river
Answer:
In 907 the Tang dynasty was ended when Zhu Wen, now a military governor, deposed the last emperor of Tang, Emperor Ai of Tang, and took the throne for himself. A year later the deposed Emperor Ai was poisoned by Zhu Wen, and died.
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