Respuesta :
I'd go for 4 when he says "by any means necessary" because Thoreau believed in fighting only when needed. he believed in using less violence but only using it if necessary. so that can be best suggested in option 4.
The last sentence is more or less what Thoreau advocated, except that Thoreau believed deeply in civil disobedience. Thoreau would NEVER have consented to use just any method of opposition to gain an end. He would never advocate violence. So, with regrets, you would not be able to pick D.
One is not even factually correct. Malcolm X was a civil rights leader, just not the same kind of leader as Martin Luther King or Jackson. Malcolm X just didn't rule out violence as a way of getting what he wanted.
(2) is a statement of historical opinion, even if it is true. It is probably your second best answer.
(3) is the actual answer. It sounds exactly like Thoreau. How you would know that is another question.