Final answer:
Sumerian influences did not cause social classes to appear during the Old Kingdom in ancient Egypt. Option a.
Step-by-step explanation:
During the Old Kingdom in ancient Egypt, the influence of the Sumerians, the increase in farming, and the increase in population were all factors that contributed to the emergence of social classes.
However, the option that did not cause social classes to appear during the Old Kingdom is a. Sumerian influences.
The paragraph from the reference information explains that during the Intermediate Period, monumental building ceased, and there was a growth in power of the nobility. This growth in power is considered one of the major causes of the collapse of royal authority and the emergence of social classes.
So Option a is correct answer.