Why did the rise of classical civilizations and classical belief systems occur at the same time?

Enough of that Foundations garbage.  That was only 5% of the test! You could literally not know any of that and still get a 5.  So, let's put on our 'big-boy-pants" and start covering some real history.  This is where it all begins.  Yeah, in Foundations you have things like... Humans, Fire, Tools, Hierarchy, Religion, Writing.  But, this is where history actually takes form.  This is where you will get your stereotypical views of certain areas.  This is where Western Europe takes root.  This is where India becomes India.  This is where China becomes China. Later on, areas like Africa, the Middle East, the Americas, et al will come into their own.  This era really deals with the Classical Civilizations (Mediterranean, India, China) and the trade between them and what goes along with that.  

from the word list given, the most suitable words that relate to the reason information were written would be:  

objectivity: lack of bias, judgment, or prejudice

accuracy: free of mistakes, to be correct

authority: the ability to tell people what to do or believe in

content: to be satisfied  

it can be said that the author made the article to present objectivity, to provide accurate information, to be the authority in the subject that he or she writes, and to be satisfied of the information quality given out.