Answer: Scientist-Practitioner Model, PhD
Explanation:
According to the given question, David is basically looking for the scientist-practitioner model, PhD program as he wants to pursing a doctoral type of degree in the psychology.
The main objective of the David is to balance between both the clinical practice and the research while selecting the program.
The scientist practitioner model is one of the type of graduate level degree or program based on the psychology research practice and studying about the various types of clinical based concepts.
Therefore, The given answer is correct.