Final answer:
Sally Frost contributes social capital to the organization by interacting with volunteers, building contacts with corporate houses, and developing long-term relations with government bodies. Therefore, the correct option is c) social capital.
Step-by-step explanation:
When Sally Frost successfully interacts with volunteers, builds contacts with corporate houses, and develops long-term relations with government bodies, she contributes social capital to the organization. Social capital refers to the connections and networks individuals form that benefit their own interests and create communities that promote reciprocity and help each other in positive ways. Sally's ability to establish and maintain these relationships enhances the organization's social capital, which can lead to increased support, collaboration, and participation.