It is true that a case study allows a more detailed look at the life of a single subject than any other study.
Answer: Option A
Step-by-step explanation:
Case Study is a detailed study of a particular subject which can be anything like an individual person or a group or a situation that has occurred at a particular period of time.
This study is a study of almost all the aspects of the subject and an in depth study of the subject of study and also the conditions of the subject is also studied. Normally to study a case study, a method of research is used to collect information of the subject that is to be studied.