Psychologists' understanding of memory has benefited greatly from the in-depth studies of such individuals as Jill Price (the woman who could not forget) and Henry Molaison (H. M.). These examples highlight the importance of the method in psychological research.

These examples highlight the importance of the Case Study method in Psychological research.

Explanation:

Case study method is the method of obtaining in depth information about certain individuals in order to develop a general principle about the behavior

Certain Pros of the case study methods are:-

It helps in obtaining as much information as it  is required about certain topics.It helps to study in detail about certain rare disorders.

Certain Cons  of this method is

It is very time consuming as a lot of time is required to obtain important information.A lot of research work is required,efforts are required and attention to minute details is also required

Icould be wrong but i would say b.