The correct answer is: C. Applied research
Applied research is a type of research that is conducted to solve a specific problem or to improve a particular situation. It is often used in business, government, and other fields where there is a need to find practical solutions to problems.
In the case of the researcher who is trying to find out which administrative style contributes more to institutional effectiveness, they are conducting applied research because they are trying to find a solution to a specific problem (i.e., which administrative style is most effective).
Basic research, on the other hand, is a type of research that is conducted to gain knowledge for its own sake. It is often used in academia and other fields where there is a need to understand the fundamental principles of a particular subject.
Action research is a type of research that is conducted by practitioners in order to improve their own practice. It is often used in education, social work, and other fields where there is a need to improve the quality of services provided.
None of the above is not a correct answer because it does not describe the type of research that is being conducted.