Answer:
b. correlational
Step-by-step explanation:
Correlational research: In psychology, the term correlational research is defined as one of the forms of non-experimental research whereby the experimenter measures or examines two different variables, assess, and understand the statistical relationship that exists between them in the absence of any influence related to an extraneous variable.
In other words, it examines the relationship between two or more than two different variables.
In the question above, Lee has used a correlational research method.