Why not A?

Hey there @keish, thanks for your post. The key here is to read the question stem carefully. It's not asking you how King differed from Thoreau, but rather how King differed from "most transcendentalists." The passage gives you the answer to this question: "Thoreau, like most other transcendentalists, was primarily interested in reform of the individual, whereas King was primarily interested in reform of society." (Lines 26-29). By contrast, the discussion of "acceptance of violence as a form of protest" (Lines 13-14) discuss only Thoreau vs. King, not "most transcendentalists." Hope this helps! Please let us know if you have any additional questions.