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

<passage>:
Gavir gingerly fitted the round opening in the bottom of the silvery of Earthmen. Malcomb told how he had been struck by Gavir's and had decided to bring Gavir to Earth. Mars was where Gavir's father had been pinned, bayonets through his Barrier, to die slowly, out of Gavir's reach. Father James told Gavir that the head of MDC himself had ordered the killing, because Gavir's Martian tribes would always protect the head of MDC from Gavir's Gavir said, "I will sing the it wouldn't matter. The dreamees receiving the dreamcast would hear the song as it sound, as Gavir heard it in his mind. Everything that Gavir saw and heard and felt in his mind, the dreamees knife, in his hand. He had faith in the knife, and in his skill with perfect. If it failed, the knife would be lost and the drock would Gavir sat down on the divan, exhausted, his song finished. He didn't He began shouting even before Gavir removed his headset. "What kind of a fool are you? Before you started that song, you dreamed things about the Martian Development Corporation that were libelous! I got the whole thing—the Barrier, the guards, the labor pools and mines, nerve-wracking business. If it weren't for Ethical Conditioning, I don't know how I'd control my aggressive impulses. The Suppression of Aggression is the Foundation of Civilization, eh?" As soon as Gavir was sure that Malcomb was out of the hotel and well civilization is explained in books." Gavir wanted to learn. It was his stopped and stared. Gavir stared back. lash fell on Gavir. He felt a savage sting in the arm he had thrown up Gavir leaped at the Earthmen. He clubbed the man with the whip across the face. As the others rushed in, Gavir flailed about him with long at once turned and ran. Gavir drew back his arm and threw the knife surprise, the blade clattered to the street far short of his retreating enemies. Then he remembered: you couldn't throw far in the gravity of Earth. The Earthmen disappeared into a lift-force field. Gavir decided not to pursue them. He walked forward and picked up his narvoon, and saw that the street on which it lay was solid black pavement, not a force-field. He must be in the lowest level of the city. He didn't know his way around Malcomb woke him at 1100. Gavir told Malcomb about the and this somehow makes them different." "Well, those people you ran into are another exception." "What is wrong with them?" "They seem to have outgrown their Ethical Conditioning. They live wildly. Violently. It's a problem without precedent, and we don't know what to do with them. The fact is, Senile Delinquency is our number one problem." "Why not punish them?" said Gavir. "They're too powerful. They are often people who've pursued successful careers and acquired a good deal of property and position. And there Gavir stiffened. They had gotten into trouble because of his "Enormous!" "Potent!" "That hunting song drove me mad. I like being mad!" "Keep him on Earth." spot on next week's Farfel Flisket Show. If he gets the right response, we talk about a contract. Okay?" Malcomb said, "His visa expires—" Gavir trembled with joy. Hoppy Davery pressed another button and a something they go for. Undoubtedly because you're—forgive me—such a complete barbarian. That's what they're all trying to be." "Spare me another lecture on Senile Delinquency, Our Number One Problem." She walked to the door and Gavir watched her all the way. professional name—Blue Boy. Gavir doesn't Gavir thought. "Perhaps you would like the ." "It's part of a fertility rite," Malcomb explained. "Great! Give the Senile Delinquents another workout. It's not quite The following week, Gavir sang the Gavir's hand leaped at the narvoon under his doublet. Jarvis Spurling ignored Gavir's hand and stared coldly at him. There I'll pay you because a Bluie on Dreamvision is good publicity for MDC products. But one slip like on your first 'cast and you go back to the Preserve." "Damn right. That Ethical Conditioning slop doesn't work on me. I've lived too long on the frontier. And I know Bluies." Grotto." Caution told Gavir to refuse. But before he could speak Spurling snapped, "Disgusting! An Earth woman and a Bluie! If you were on Mars, lady, we'd deport you so fast your tail would burn. And God help the Bluie!" sick." "You can't claim any monopoly on mental health. Not with that Gavir grinned at Spurling. "The contract, I believe, does not cover my strolled out. "You screwball Senile Delinquent," Spurling yelled after Sylvie, "you oughtta be locked up!" "He seemed happy to get away from me," said Gavir. know what I wanted to do. It was Ethical Conditioning or nothing, so I picked nothing. And here I am, chasing nothing." costumes and manners of some more colorful time. You try ridiculous things, disgusting things, vicious things. You know they're all nothing, but you have to do something, so you go on doing nothing, elaborately and violently." it, chuckled, and read it again, aloud. "Sir: I beg you to forgive the presumption of my recent attack on In the months that followed, Gavir's fame spread over Earth. By Davery doubled Gavir's salary. Then there came the dreamcast on which Gavir sang the Complaint . It was an ancient song, a Desert Man's outcry against injustice, enemies, false friends and callous leaders. It was a protest against the song Gavir pictured a tribal chief who refused to make fair bundles of money from a starving Gavir. Then he ended the song. A recorded voice boomed: "This is Hat Rat. Pay the Blue Boy what he deserves, or I will give you death. It will be a personal thing between you and me. I will besprinkle you with corrosive acids I will burn out your eyes Hoppy cut the voice off. Gavir saw that he was sweating. "There were Gavir spread his big blue hands. "I am sorry. I don't want more money. my mind even though they have nothing to do with me." Hoppy shook his head. "That's because you haven't had Ethical Conditioning. We don't have this trouble with our other performers. You just must remember that dreamvision is the most potent careful ." "I will," said Gavir. On his next dreamcast Gavir sang the not throw his knife. That would not have satisfied his hatred. He fell "Let him come and find me," said Gavir. "Let us go, Sylvie." An hour passed from the time of Gavir's arrival. him. Jarvis Spurling's square face was dark with anger. "You deliberately put my face on that animal! You want to make the public hate me. I pay your salary and keep you here on Earth, and this is what I get for it. All right. A Bluie is a Bluie, and I'll treat you like a Bluie should pistol out and pointed it at Gavir. Gavir stood up. His right hand plucked at his doublet. Gavir took out the narvoon, grasped the blade, and drew his arm back. "Gavir!" down your enemy, Gavir!" Spurling's body was thrown back against Gavir. Gavir saw a huge ragged Still holding the narvoon, Gavir stood over his dead enemy. He threw

<question>:
Why can't Gavir throw his knife?

<options>:
A He is worried about losing it
B He can
C The gravity is different
D It would be illegal

<answer>:

C