Answer:
b) correlational research
Step-by-step explanation:
In psychological research, correlational research is described as one of the different types of 'non-experimental' research method whereby an experimenter or a researcher tries to measure two different variables, analyzes and understands the existing 'statistical relationship' between the given variables having no effect of an extraneous variable.
In reference to the given question, Aron's study is most likely a correlational research method.