Read the following passage and questions, then choose the right answer from options, the answer should be one of A, B, C, D.

<passage>:
especially a town that is Extensive research did not uncover any evidence that the U.S. copyright on this publication was renewed.] Sure I'm a Nilly, and I've died seven times, always in the blackness of the outer reaches, and I'm not alone, although there aren't very many of us, never were. abscence, if you're interested." ." The had taken off on the first trip to Antheon five years before with a thousand families, reached the planet with less than five hundred surviving colonists. Upon the return to Earth a year later, the crew's report of suffering and chaos during the year's outgoing voyage was twisted, distorted and fragmentary. Ellason remembered it well. The life." "As I recall," Ellason said, "there was something about stunners." must remember the colonists were selected for their intelligence and to arm themselves." "Yes. We gave control to the colonists." is going to happen, but if it does, we want to get an impersonal, "If I return," said Ellason. "I suppose that's problematical," Phipps said, "but I think you will. do." He grinned. "You can write that novel you're always talking about Weblor II ." Being a Nilly is important, probably as important as running the ship, and I think it is this thought that keeps us satisfied, willing to be what we are. The which would open distant vistas to colonization, reducing the promised land, the new frontier. A space-borne metropolis, it would was caught and whisked away. not dwelt on it. Now it loomed large in his mind. "I don't understand, "Let me put it differently. Let me say that you will not understand why he thought it would be, put his arms behind his head, stared at the rules fall away, the floundering group seeks a new control, for they bearings but nonexistent things, and values are altered if they are not "What would he want seeds for? Have you thought of that?" tired face and sad eyes. He said, "Now what am I going to Antheon Interstellar asked me to go along. But what use am I now? Where am collect them? They're not ordinary seeds, Mr. Ellason." return in the interests of the Antheon colony and of humanity. On the thirty-fourth day a witness turned up who said he had seen a man emerging from Janssen's compartment with the black case. "I didn't think anything of it at the time," Jamieson Dievers said. Branson asked him to describe the man. "Oh, he was about six feet tall, stocky build, and he wore a red rubber Dievers shrugged. "This is a spaceship. How would I know whether a red mask—or a blue or green one—does or doesn't belong on a spaceship?" discounted. "If it is true," Branson told Ellason, "the theft must be the work of a psychotic. But I don't believe Jamieson Dievers. It may well be he's the psychotic." He snorted. "Red rubber mask! I think I'll have Dievers put through psychiatry." compresses, stultifies. He introduces a countermeasure, proof he exists, which is any overt act, sometimes violent. On the forty-fifth day June Failright, the young wife of one of the her compartment while her husband was in the ship's library. She was taken to one of the ship's doctors, who confirmed it. She said the culprit was a husky man wearing a red rubber mask, and though her description of what he had done did not appear in the story the ship. Antheon." suppose I assign the crew to patrol duties, the culprit isn't caught, fault. And soon the colonists will begin thinking these things might be the crew's doing in the first place." "Yes," Ellason said, "but what if the intruder is a crewman?" As a Nilly, I knew that space breeds hate. There is a seed of the ill, had been hospitalized with a diagnosis of ileus. He had put his in a red mask was seen hurrying from the hospital area, and a staff investigation revealed that Palugger had died trying to prevent the theft of the belt. and tempers short. Above it all was the overpowering presence of "How can we protect ourselves without stunners?" one colonist called out. "What's that?" At another assembly the following day it was decided to make the We Nillys know about hate and about violence. We know too that where death. During sleep time on the seventy-ninth day Barbara Stoneman, awakened by a strange sound, sat up in the bed of her compartment to find a escaped. "There's no law against it," Branson said, "but it's a rule of mine "And I might have a murder on my conscience." Tilbury said, "We've also thought of that. Suppose you supply us with half-power stunners? That way we can stun but not kill." retreating figure. commit any crime. We've got him on the run, the colonists said. He's afraid to do anything, now that we've got police protection, they said smugly. the landing on Antheon. leaving disorder behind. Ellason interviewed as many victims as he could, noted it all in "What does he want that stuff for?" Casey Stromberg, a passenger doctor, asked. "I can see him taking my narcotics, my doctor's kit—but my dead wife's picture? That I don't understand." insane." Many people said it. without some new development. "And what will you do when you get him?" fiercely than ever. "Without a trial?" named Terryl Placer on the 201st day. The criminal was carried to the assembly room surrounded by guards, for he surely would have been mauled, if not killed, by angry colonists who crowded around. In the "Well, Critten," Branson roared at him, "what have you got to say for and then. do with the loot, Critten?" Critten looked him square in the eye and said, "I threw it out one of the escape chutes. Does that answer your question?" "Threw it away?" Tarper and the crowd were incredulous. lazy bastards." The verdict was, of course, death. by a great crowd in the assembly hall. A detail from the ship's crew disposed of his body through a chute. It was all duly recorded in Keith Ellason's notebooks. Dying is easy for a Nilly. Especially if it's arranged for beforehand, which it always is. The "Hello," Critten said, grinning from ear to ear. "Can't say I enjoyed the role," said Critten, "but I think it saved lives." "Let me get this straight. Interstellar thought that it was idleness trained to be a scapegoat. Is that right?" "To say nothing of me," Critten said. "Naturally." see, I was a liar." "How about that assault on June Failright?" Critten grinned again. "She played right into our hands. She ran out robbed along the corridor. That really stirred them. Lucky nobody got hurt during any of it, including that Stoneman woman. I was trying to rob her when she woke up." Branson cleared his throat. "Ah, Ellason about that story. You understand you can't write it, don't you?" be other ships outward bound." Critten sighed. "And I'll have to be caught again." Yes, we're anonymous, nameless, we Nillys, for that's what we call each other, and are a theme, with variations, in the endless stretches of deep space, objects of hatred and contempt, professional heels, dying once a trip when the time is ripe, antidote to boredom, and we'll ply our trade, our little tragedies, on a thousand ships bringing humanity to new worlds.

<question>:
What is a Nilly?

<options>:
A A Nilly is a trained operative used by colony transport ships to keep the colonists focused on a common enemy.
B A Nilly is a person who works on the crew on an interstellar ship.
C A Nilly is a black ops agent.
D A Nilly is a person, who is able to come back from the dead, but like Lazarus, not like a zombie.

<answer>:

A