Final answer:
The nurse providing primary prevention for homelessness implements job training programs to address the root causes and reduce the risk of homelessness by improving employment prospects and self-sufficiency.
Step-by-step explanation:
A nurse providing primary prevention when working with the homeless would focus on actions that prevent the onset of poor health conditions before they occur. In the context of primary prevention for homelessness, this would involve strategies that address the root causes and seek to reduce the risk factors associated with becoming homeless. Offering effective job training programs (option c) best describes the implementation of primary prevention in this scenario since it aims to prevent homelessness by increasing employment opportunities and economic self-sufficiency, directly tackling one of the root causes of homelessness.