Final answer:
The appropriate answer is 'c. Structures, agents', which signifies the importance of both establishing supportive structures and having dedicated agents to manage and encourage change within a community or organizational context.
Step-by-step explanation:
The question is asking about how change within a community or organization can be effectively managed and what elements are necessary to enable and encourage such change. In the context of community psychology and community development, it's essential to create strong bonds of social cohesion between community leaders and groups and to leverage existing community assets such as elders and leaders. These elements create a supportive environment for change.
To successfully facilitate change, a combination is required of creating structures which enable the change, as evident in community cohesion and asset-based approaches, and agents to encourage change to occur. These agents can be formal or informal leaders who act as champions of the change process and are crucial in promoting harmonious change within community systems without creating generational conflict.
Based on the principles discussed, the most suitable answer to the question would be 'c. Structures, agents', indicating that for effective change, supportive structures need to be established along with agents who actively promote and manage the change process.