The historian may be from any period. Similarly, there are several historians who have written magnificent works using a sea or an ocean as a geographically unifying theme, among them Ferdnand Braudel. There are also historians drawing on different countries' different academic traditions. Some of the same considerations in option 1 should shape your study for option 2 as well. Write a comparative and critical analysis of selected historical writing on the problem, discussing those factors that shaped the views of the historians you consider and that contributed to the differences between them.
American slavery is such a problem as is the French Revolution.
There are many others. It is even more important to remember you are not discussing the problem for its own sake but rather in order to understand the views taken by relevant historians and why they took such views. Consider factors that have contributed or should be considered in such a presentation. Review a carefully chosen body of historical fiction or non fiction as appropriate teaching materials for upper elementary or secondary students. Such a review should consider the reliability of the works as images of the history presented and their suitability for use as supplementary materials for students.