The options of the question should be, A) the geography of an area. B) Firsthand interviews. C) archives in a library. D) the weather and climate of an area.
The correct answer is C) archives in a library.
A historian most likely studies archives in a library to find data.
Historians go to a library to study the archives and information of the many books, documents, newspapers and magazines that can be found there. In this place, Historians can find resourceful information that help them to direct their research and go get some interviews or to do research on the field.