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

<passage>:
blood," old Dunbar told the space-wrecked, desperate men. drifted together, four men in bulbous pressure suits like small individual rockets, held together by an awful pressing need for each other and by the "gravity-rope" beam. Dunbar, the oldest of the four, an old space-buster with a face Suddenly, Old Dunbar had known where they were. Suddenly, Dunbar knew which sent a man a few hundred thousand miles further on toward wherever he was going. Four men, thought Russell, held together by an invisible string of gravity, plunging through a lost pocket of hell's dark where there had never been any sound or life, with old Dunbar the first in line, taking the lead because he was older and knew where he was and where he was going. Maybe Johnson, second in line, and Alvar who was third, knew too, but were afraid to admit it. But Russell knew it and he'd admitted it from the first—that old Dunbar was as crazy as a Jovian juke-bird. Dunbar's suit up ahead, watching it more and more intently, thinking about how Dunbar looked inside that suit—and hating Dunbar more and repeat. Sometimes Russell thought of other things besides his growing hatred thought then of what Dunbar would say to such a thought, how Dunbar Dunbar had a big answer for every little thing. for Dunbar. Hell no—Dunbar had to start talking about a place they And Dunbar had spouted endlessly about a world of treasure they would find, if they would just follow old Dunbar. That's what all four of away could see or care. Still—we might have a chance to live, even now, Russell thought—if it weren't for old crazy Dunbar. They might have a chance if Alvar and Johnson weren't so damn lacking in self-confidence as to put all their trust in that crazed old rum-dum. Russell had known now for some time that they were going in the wrong direction. No reason for knowing. Just a hunch. And Russell was sure his hunch was right. "We're about in the middle of those four suns aren't we, Dunbar?" "That's right, boys!" yelled old Dunbar in that sickeningly optimistic life on it, Dunbar ... the only one we can live on?" Russell asked. "That's right! That's right," Dunbar yelled. "That's the only one—and Dunbar?" Russell asked. Keep the old duck talking like this and maybe Alvar and Johnson would see that he was cracked. "Yeah," said Alvar. "You still say that, Dunbar?" "No life, boys, nothing," Dunbar laughed. "Nothing on these other Russell said. "Yeah, that's right," said Alvar. "Sometimes I see a red rim around the one we're going for, sometimes a red rim around that one on the Old Dunbar laughed. The sound brought blood hotly to Russell's face. than old Dunbar will ever be, even if he keeps on getting nuttier all was to get rid of Dunbar. "Lost people ... lost ... who knows how long," Dunbar said, as the always spring, always spring, boys, and the music plays all night, every night of a long long year...." Russell suddenly shouted. "Keep quiet, Dunbar. Shut up will you?" Johnson said. "Dunbar—how long'll it take us?" "Six months to a year, I'd say," Dunbar yelled happily. "That is—of "What?" croaked Alvar. Johnson didn't say anything at all. Russell screamed at Dunbar, then quieted down. He whispered. "Six "Shut up!" Johnson yelled. Dunbar laughed. "Boys, boys, don't get panicky. Keep your heads. Just stick to old Dunbar and he'll see you through. I'm always lucky. Only on our hungry hides. That's worth waiting for." Russell did it before he hardly realized he was killing the old man. It was something he had had to do for a long time and that made it pierced Dunbar's back. Now the fire was gone, extinguished Dunbar's last faint cry from inside his suit still rang in Russell's ears, and he knew Alvar and Johnson had heard it too. Alvar and Johnson both called Dunbar's name a few times. There was no answer. "Russ—you shouldn't have done that," Johnson whispered. "You shouldn't have done that to the old man!" "No," Alvar said, so low he could barely be heard. "You shouldn't have done it." "I did it for the three of us," Russell said. "It was either him or us. Lies ... lies that was all he had left in his crazy head. Paradise ... "Maybe he was lying, maybe not," Johnson said. "Now he's dead anyway." "Maybe he was wrong, crazy, full of lies," Alvar said. "But now he's dead." "How could he see any difference in those four stars?" Russell said, louder. "He thought he was right," Alvar said. "He wanted to take us to " Shhhh ," said Alvar. It was quiet. How could it be so quiet, Russell thought? And up ahead the old man's pressure suit with a corpse inside went on ahead, leading the other three at the front of the gravity-rope. "Maybe he was wrong," Alvar said. "But now do we know which way is right?" Sometime later, Johnson said, "We got to decide now. Let's forget the decide what to do." And Alvar said, "Guess he was crazy all right, and I guess we trusted him because we didn't have the strength to make up our own minds. Why because he was alone. He'd have broken away, gone his own direction, long ago but for that fear. "How can we tell which of us is right?" Alvar said. "It's like "The one to the right," said Johnson. "We been going away from the right one all the time," said Alvar. "We got to stay together," said Russell. "Nobody could spend a year out here ... alone...." "Ah ... in another month or so we'd be lousy company anyway," Alvar can come and help the other two...." "No ... God no...." Russell whispered over and over. "None of us can ever make it alone...." Alvar said, "We each take the star he likes best. I'll go back the other way. Russ, you take the left. And you, Johnson, go to the right." Johnson started to laugh. Russell was yelling wildly at them, and above his own yelling he could hear Johnson's rising laughter. "Every guy's got a star of his own," Johnson said when he stopped laughing. "Okay," Alvar said. "We cut off the gravity rope, and each to his own sun." Now Russell wasn't saying anything. "And the old man," Alvar said, "can keep right on going toward what he thought was right. And he'll keep on going. Course he won't be able to old Dunbar? Even less than to us, I guess. He's dead and he won't care." "Ready," Johnson said. "I'll cut off the gravity rope." "I'm ready," Alvar said. "To go back toward whatever it was I started from." "All right," Johnson said. "Good-bye." Russell felt the release, felt the sudden inexplicable isolation and aloneness even before Alvar and Johnson used their life-guns and shot out of sight, Johnson toward the left and Alvar back toward that other red-rimmed sun behind them. And old Dunbar shooting right on ahead. And all three of them Fading, he could hear their voices. "Each to his own star," Johnson said. "On a bee line." "On a bee line," Alvar said. Russell used his own life-gun and in a little while he didn't hear Alvar or Johnson's voices, nor could he see them. They were thousands of miles away, and going further all the time.

<question>:
Why does Dunbar continue to tell stories of an enchanting paradise?

<options>:
A To motivate them to keep persisting until they arrive
B To convince himself that he is choosing the correct star
C To assuage his crewmen's minds before they inevitably die
D To lure the Johnson, Alvar, and Russell into a trap

<answer>:

A