Please help :D How did the Tang people gain the Mandate of Heaven?

A. Song rulers grew weak and quarreled among themselves.
B. Arab traders took over the Silk Road trade, which undermined the Tang economy.
C. Tang invaders from the far north overthrew the Sui dynasty.
D. A Sui official led a rebellion that caused the Sui dynasty to collapse.
Thx so much if u could :)

according to the report, the government has imposed restrictions on freedom of speech, freedom of the press, freedom of assembly, and freedom of association. the official media remained tightly controlled by government censorship and obstruction. restrictions on the freedom to assemble remain a problem in vietnam.

explanation:

a plantation economy is an economy based on agricultural mass production, usually of a few commodity crops grown on large farms called plantations. plantation economies rely on the export of cash crops as a source of income.

i hope this : )

they spoke the dravidian language. hope this , correct me if im wrong

immigrants from northern and western europe continued coming as they had for three centuries, but in decreasing numbers