The correct options are
A The languages they were written in.
B The people or population they catered to.
D Their respective stances on the privileges claimed on account of birth.
While elements such as language and population catered to are the obvious differences between the two, it is perhaps interesting to note their respective stances on the privileges claimed on account of birth. For example, in relation to the tawarikhs, people believed that nobles
inherited their rights to govern, because they were born into certain families. In complete contrast, Genghis Khan favoured meritocracy. It was a system where people were rewarded on the basis of skill and not their relationships to the people in power.