In a Research Study, Burn Patients Either Washed Their Own

In a research study, burn patients either washed their own wounds or had them washed by nursing staff daily. Patients performed self-washing on alternate days. Pain was measured at intervals during dressing changes. Patients also were interviewed near the end of hospitalization, after all dressing change data had been collected, and analyzed from the theoretical perspective of symbolic interactionism, in order to determine what factors had made their pain more severe or less severe, under each condition. What study designs were used in this research project?

A) Grounded theory research
B) Explanatory sequential strategy
C) One-group pretest-posttest design
D) Mixed methods research
E) Time series repeated reversal design