#1 Yuan Dynasty unified China after a period of more than 300 years. ...
#2 The first paper currency to be used predominantly was Yuan's official banknote Chao.
#3 Yuan astronomer Guo made the most accurate calendar built till then in China.
#5 Novel was developed as a literary form.
The correct answer to this open question is the following.
Although the previous link was not attached, we can say the following.
The central ideas or information of a primary or secondary source are the following,
A primary resource comes from the people who witnessed the event, the incident, or the specific moment. These people could have written their own descriptions, testimonies, books, or maybe journalists that directly reported what happened. It also could be an interview with people who were part of the historical event. For instance, if it is a soldier that participated in the Vietnam War, a journalist can interview him and use it as a primary source.
On the other hand, secondary sources can be obtained from other sources that were not direct. This could be an author that based its story in other investigations, or it could be encyclopedias.
The factor that the nearly 300,000 Africans involuntarily brought to the British mainland colonies during the 18th century hold in common is that the true notion or fact about their slavery.
<h3>What was the main purpose of slavery?</h3>
In all of the 17th and 18th centuries, people were said to have been kidnapped from the continent of Africa and were known to have been forced into slavery in areas of the American colonies and they were also said to have been exploited to work in the making of crops.
Note that African slaves were said to have been used for in the British colonies because big ships was said to have travelled over the Atlantic to the American colonies and that was where a lot of Africans were said to have been sold for sugar, tobacco, and others.
Therefore, The factor that the nearly 300,000 Africans involuntarily brought to the British mainland colonies during the 18th century hold in common is that the true notion or fact about their slavery.
Learn more about slavery from
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Democracy dates back to have started to develop in the days of Ancient Greece in the city state of Athens.
Not sure if this is what you were looking for but I hope it helps.