What was the significance of conquering Timbuktu?
Olt served as a commercial and learning center.
Olt served as a rich and cultural city.
Olt served as a governmental center for the city.
Olt served as a city of military significance.

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.