How did the Tang people gain the Mandate of Heaven? Song rulers grew weak and quarreled among themselves.

Arab traders took over the Silk Road trade, which undermined the Tang economy.

Tang invaders from the far north overthrew the Sui dynasty.

A Sui official led a rebellion that caused the Sui dynasty to collapse.

The correct answer is (D) A Sui official led a rebellion that caused the Sui dynasty to collapse.

Explanation:

"A Sui official led a rebellion that caused the Sui dynasty to collapse."

Explanation:

answer:

the majority of cambodians living today were born after the khmer rouge was ousted in 1979 and some who survived can forget how bad it was. when khmer rouge forces seized phnom penh on april 17, 1975, the couple was living with eight of their children in a rural town called kampong chhnang.

explanation:

while it was true that the cotton gin reduced the labor of removing seeds, it did not reduce the need for slaves to grow and pick the cotton.

explanation:

before eli whitney's invention of the cotton gin, picking and cleaning cotton was a slow, labor-intensive job. workers, usually slaves, had to pick the seeds from the cotton fibers by hand. this invention made it possible to grow large amounts of cotton on big farms and make money.