I voted the last option, because I think you all are completely missing the point. Let me explain.
There are several types of leaders:
Type 1 leaders are commanders, people who actually organise things, command people. They can tell people what to do and those people will do it.
If you assassinate a type 1 leader of an organisation, that organisation will be severely damaged, because the person who makes it work will be dead. A power vacuum may arise that could cause tensions within the organisation and the organisation may split. Or the organisation will find a new leader and become angry at you.
Type 2 leaders are moral or spiritual leaders. They don't organise things, they inspire people. They provide the philosophical ideas of a movement. People accept them as leaders because such leaders tell them things that they can relate with, that resonates with what they think they see around them. By providing a philosophical framework that includes apperent solutions to the problems people face, people will seek those solutions. A type 2 leader does not tell people what to do, they tell them what to think. And as long as he is respected, people will believe what he says.
If you assassinate a type 2 leader, the ideas he stands for don't go away. People will still believe them. The only thing you achieve with killing a moral leader is to make it impossible for him to ever make a mistake that could cause people to lose respect for him. The prestige he earned in life will be frozen in time, because he can longer do anything that causes people to lose respect for him.
When you are dealing with a deaf-blind paraplegic I think it is fairly obvious that he is a type 2 leader. He can no longer read maps, order bombs or evaluate the quality of them. He can no longer physically lead an organisation. He can only give speeches to inspire people to do things he wants them to do. Killing him only strengthens the ideas of the people who believed in him, and there is nothing he can do or say now that makes people lose faith in him.