Step 1: Criteria of differentiation.
Sociologists differentiate rural and urban societies based on multiple aspects:
\begin{itemize}
\item Nature of Business: Rural societies are dominated by agriculture, while urban societies are dominated by industries and services.
\item Population Size: Rural areas have smaller, more stable populations; urban areas have larger, denser populations.
\item Nature of Social Relationships: Rural societies exhibit close-knit, primary relationships (Gemeinschaft), while urban societies show impersonal, secondary relationships (Gesellschaft).
\end{itemize}
Step 2: Conclusion.
Since all three factors are used, the correct answer is "All of the above."
Final Answer: \[ \boxed{\text{All of the above}} \]
Translate the following passage into English: to be translated
Translate the following into English:
Translate the following passage into English: