Which of the following statements best describes the Incan social class structure?

The social class structure of the Incas was divided in four: the Sapa Inca (the king), the royal family, the nobility and the commoners (ayllu). Along high nobles, low nobles or Hahua Incas were also in charge of administrating and organizing the empire. They were given these positions thanks to their skills in military and planning. Since they often excelled in their duties, they were granted privilege's by the Sapa, such as being liberated from paying taxes

Explanation:

Inca society was based on a strictly organized class structure. There were three broad classes: The Emperor and his immediate family, nobles, and commoners. Throughout Inca society, people who were “Inca by blood” – those whose families were originally from Cuzco – held higher status than non-Incas.

even though you have attached neither the chart nor the generalizations, i have located them online. the right answer is d, since they are asking you about a generalization. you can only infer from the chart that between 2008 and 2009 the number of employed workers decreased significantly (from over 115 millions to 107 millions approximately), which signals some type of economic crisis.