The correct answer in my opinion would be that D is the most important factor here. But this question is quite tricky.
We can surely say for example that literature, organized schools and a hierarchy of priests are not something that constitute a civilization. Organized schools appeared to late, not every civilization had literature and having only a hierachy of priests is not enough to say you have a civilizaton.
Labor has been divided in pre-civilization hunter-gatherer societies as well.
For that reason I'd say the correct answer is D - more food than is needed for survival. Having this, the people in a certain group can focus on other things.
Here is the answer. I've already drawn lines to the answer.
In Europe, late in the century, the Vikings, seafaring peoples from Scandinavia, begin raiding the coasts of Europe and the Mediterranean, and go on to found several important kingdoms.
In Asia, the Pala Empire is founded in Bengal. The Tang Dynasty reaches its pinnacle under Chinese Emperor Xuanzong. The Nara period begins in Japan.
<span>The answer was true.
In the North, industry was now growing and from its growth many Northern
States became wealthy. It also ushered
in progressive ideas where many believe that is better to hire workers and pay
them well rather than keep slaves for labor.
Those who work for better pay get more done than those who are in
bondage. Slavery closed the minds of
people in the South. Apart from clinging
to an outdated system, slavery is a cruel trade wherein people are treated like
property and made to serve others against their will. Because they didn’t have enough industries,
they fell behind the North.</span>
