Final answer:
Common courtesy is most closely associated with showing respect, as it involves polite, kind, and considerate behavior towards others.
Step-by-step explanation:
Common courtesy is often associated with showing kindness, regard, and politeness toward others, which is fundamental to how we interact socially. While all the options provided in the question (empathy, interdependence, respect, and need) can be related to courtesy, the most fitting answer among them is C. Respect. Showing courtesy is generally recognized as a way of expressing respect for someone else's feelings and needs.
For example, holding the door open for another person or saying 'please' and 'thank you' are acts of courtesy that demonstrate acknowledgment and consideration for others, thus embodying respect. In contrast, empathy refers to the ability to understand and share the feelings of another, interdependence highlights the mutual reliance between groups or individuals, and need is a requirement for something. While these concepts can intersect with courteous behavior, respect is the underlying principle that directly fuels the practice of courtesy.