Answer: To mark historical moments in are society, so that we can know when they happened hopefully preventing anyone from distorting information.
The name of Kublai khan took after he integrated Chinese culture into mongol way was Yuan.
<u>Explanation:</u>
Kublai Khan was the founding father of the famous Yuan Dynasty and grandson of Genghis Khan. Kublai conquered China and he owned the fame of the first Mongols to conquer China. Also, he unified China with the Mongol way with his wise rule.
His distinguished rule from other rulers and the Chinese people also treated well under his rule. Moreover, he improved the infrastructure of the region by proving services like postal and grand canal extension.
Also, his religious tolerance was another advantage since he allowed the Chinese people to follow their traditions and religious ways. Also, under his rule, many scientific advancements were discovered like the Chinese calendar, the institute for medicine, accurate maps, etc.
The answer is b. His work became the basis for algebra.
A historian compares the events by period since he compares them by time period
