The most accurate conclusion that can be drawn from the passage 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 conclusion aligns with the teachings of Confucianism, which emphasize governance through benevolence, trustworthiness, and respect for the common people, as illustrated in the passage.