Choose a middle-range theory or grand theory in nursing that, in your opinion, can be applied to research

Choose a middle-range theory or grand theory in nursing that, in your opinion, can be applied to research

Choose a middle-range theory or grand theory in nursing that, in your opinion, can be applied to research. Answer the following questions in a single page Word document:
1. What are the assumptions underpinning this theory?
2. How this theory finds application in nursing research?