Eliminating C

I eliminated C because the question is asking about "Civil Disobedience" the book, not the concept. Note that the question has "Civil Disobedience" in capital letters referring to the title of the Thoreau's book; where as answer-choice C is referring to the concept of "civil disobedience" a notion that has variance among transcendentalists. Answer-choice would have correct if the question was about the concept itself, not the book. In other words, we don't know whether Dr. King used the Book "Civil Disobedience" to effect social change, although there is textual support that he used the concept itself. But we do know that he was influenced by the book per the first paragraph. Am I correct?