Final answer:
Community health nurses use a multidisciplinary approach, employing theories from various disciplines, not just from nursing or medical science, to inform their practice.
Step-by-step explanation:
Community health nurses often utilize theories from various disciplines to inform their practice. The correct statement about the use of theories by community health nurses is c. Community health nurses often use theories from other disciplines. These may include theories from sociology such as structural functionalism, conflict theory, and symbolic interactionism; critical theories of health from anthropology, which may critique and propose improvements in healthcare systems or policies; and concepts from community psychology involving engagement with community groups based on adult education methods and critical reflection. In essence, a community health nurse's theoretical approach is multidisciplinary, allowing them to address the multi-faceted nature of health within communities.