GMAT Reading Comprehension (RC) | Re: In its 1903 decision in the case of Lone Wolf v. Hitchcock

Hi experts, andmikemcgarry
would you please guide how should I distinguish B and C for main idea question. following is the detail of the main idea question
"The author of the passage is primarily concerned with

A. identifying similarities in two different theories
B. evaluating a work of scholarship
C. analyzing the significance of a historical event
D. debunking a revisionist interpretation
E. exploring the relationship between law and social reality"

I picked up B , but correct
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