Dr. okawa is interested in studying the effect that neurological trauma can have on short-term memory. firstly, he collects detailed information from a small number of individuals who have experienced brain damage. using information provided by medical records, interviews, and observations, he attempts to create an in-depth portrait of each individual. what type of research method was used in this study?
a. case study
b. naturalistic observation
c. experimental method
d. surveys

A) Case study.

Explanation:

Case study is a process or record of research into the development of a particular person, group, or situation over a period of time.

It is basically a research strategy and an empirical inquiry that investigates a phenomenon within its real-life context.A case study is a descriptive and exploratory analysis of a person, group or event. Case studies are often used in exploratory research. They can help us generate new ideas (that might be tested by other methods). They are an important way of illustrating theories and can help show how different aspects of a person's life are related to each other.

what is the question if there is *super confused*

i agree d is most definitely correct!