Answer:
The Tang Dynasty, which ruled China from 618 to 907 CE, conquered Vietnam, and made it the southernmost province of China.
Vietnam, up until that point, had been a problematic place for China, even it it was much smaller. The Tang Dynasty was able to conquer the area, and integrate into the central bureacuracy of the Empire, this is why they began to referred to Vietnam as the "pacified south".
Answer:
Both were ruled by powerful leaders
The primary distinction between modern communism and socialism is that socialism allows for some private ownership of property and businesses. The communism on the other hand has the government holds all properties.
The answer to your question would be choice D.
A text that fits this criteria would be a "secondary source" since it is compiled by primary sources (which are used as direct evidence). Although certain secondary sources are reliable in other ways.
