The nurse working in a community clinic attempts to establish a free vaccination program to refer low-income families. What is the key strategy for success when implementing a health promotion activity?

The correct answer is D: Partnership development. Establishing partnerships with community organizations, healthcare providers, and local businesses is crucial for the success of a health promotion activity. Partnerships can provide resources, expertise, and support, increasing the reach and impact of the program. Funding (A) is important but not the key strategy; without partnerships, funding alone may not lead to successful implementation. Adequate staffing (B) is necessary but not the key strategy for success. Finding an audience (C) is important for targeting efforts but does not ensure success without strong partnerships.