the missouri compromise, passed in 1820, admitted missouri to the union as a slave state and maine as a free state. it was meant to appe

The answer is C. If two arguments about a historical event contradict each other, historians should search for additional evidence to see wich argument it supports.

Historians' work must be based on evidence; when researching certain historical event, they examine primary sources, such as texts, documents, pictures, diaries, etc., from that time period, these documents are the evidence they interpret in order to formuate an argument about such event.