The correct answer is:
D. as a record keeping system to keep track of economic information.
Explanation:
Quipus, also known as khipus or talking knots, were registering devices historically used in a number of cultures and particularly in the region of Andean South America. The cords included numeric and other values encoded by knots in a base ten positional system. The only potential Incan example of encoding and recording information could have been cryptic knotted strings identified as khipu.
It is clear to see that in an unequal society where there is a misallocation of wealth, the less fortunate will fight for their rights and for equality. The system ends up affecting these populations in a big way, for this reason, they end up uniting people from similar realities, such as union workers, lower middle class people, and mutual aid societies. What unites them is common interest: equality, social justice, better distribution of income, better wages, etc. The upper class society does not join this cause, because it does not generate any interest. This may affect their fortunes. That's why they tend to separate. When it comes to political parties, social interested play a important role on it too. It's always about the interests.