Your answer is B. Thoreau believed in nonviolent actions, and only using force when needed. The line would be B because it shows that he and his folks would respect those that got outta jail. normally ppl wouldn't do that and would rather brutally treat them.
A is wrong because it doesn't show that he believes in nonviolence.
B is correct
C has to do with a personal story, once again having nothing to do with civil obedience
D is wrong because that is another personal story
E is completely irrelevant