The Nurse Is Participating in a Clinical Research Study

The nurse is participating in a clinical research study.Which research problem would be addressed using this research approach?

A) Are nurse managers with advanced degrees more successful in the career than those who do not have advanced degrees?
B) Is computerized learning more effective for retention than simulations?
C) Does a clear liquid diet control nausea better than a regular diet in the patient receiving chemotherapy?
D) Are nurses with baccalaureate degrees more likely to seek employment in critical care than nurses with associate degrees?