Which of the following statements is true about case studies?

A) Case studies are not used in the study of rare problems, as people often have biased recollections of their experiences.
B) Case studies are the most apt method for capturing the uniqueness of an individual's perspective and experiences.
C) Case studies have high generalizability, that is, their findings can be applied to other individuals and groups.
D) Case studies have a high degree of objectivity on the part of the people telling their stories and on the part of the therapists and researchers listening to the stories.