Why did the Mayans create a detailed writing system?

to keep track of trade

to keep track of the seasons

to keep track of political rules

to keep track of families

The Mayans did it to keep track of political rulers which were records of a transfer of power. So the answer would be C.

They want to keep track of their political rulers,

As the researchers say, that the Mayans respect their leaders and rulers like a god who gives everything they need. That's why it is important for the to keep a record of their leaders so that/s how they have created their detailed writing.