The correct answer is D.
A historical researcher is a job/occupation that requires both, strong skills and an interest in working on one's own.
Strong skills are needed because knowledge and patience are necessary to perform this task correctly. One of this skills must be discipline, as the work hours will be flexible and the person doing this job would be his/her own supervisor. Organization and logical thinking are necessary too because research is always time consuming and some of the information provided for it may be confusing. It is also a lonely job and the person doing it must like working on his/her own.
All the other listed job require interaction with other human beings, especially the office manager job. Laboratory technician would be the second best choice as the human interaction here is still present but limited in time and space.
