How Is It That an Investigator (Researcher or Practitioner) Both

Multiple Choice

How is it that an investigator (researcher or practitioner) both controls and is controlled by the subject matter?

A) The investigator must control the factors whose effects are under study and other outside factors, while the data from the study serve as a prompt for any needed changes
B) The investigator selects the subject matter that they are interested in and the literature controls what research design is selected
C) The investigator controls the factors whose effects are under study and other outside factors, while the literature controls what research design is selected
D) The investigator selects the subject matter to be studied, and the variability in the data controls what type of research design is selected