PT73.S1.Q27 (P4) - most accurately describes the difference in approach

Glutton for the LSAT

I chose (C) and I think it's wrong because passage B doesn't cite any authorities. But I take issue with the correct answer being (A) because it says that passage A "[doesn't] provide details," which I think it does. Doesn't citing what might be necessary requirements for a principle of rectification count as "details"?

Any help and clarification would be much appreciated.

Admin Note: Edited title. Please use the format: "PT#.S#.Q# - brief description of the stimulus
Explanation video: https://7sage.com/lsat_explanations/lsat-73-section-1-passage-4-questions/