The conclusion that can be drawn about how Confucianism influenced the social class system between Zhou rulers and their subjects is:
Rulers understood that peasant farmers had to be treated respectfully so that they could produce enough food to feed the general population.
This choice aligns with the emphasis on reverence, trustworthiness, and respect for the labor of common people as indicated in the passage. Confucianism stresses the importance of virtuous leadership and understanding the needs of the people, which includes treating peasant farmers with respect to ensure the stability and productivity of society.