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 globe over the top of his hairless blue skull. He pulled the globe hands and feet, to the wall of a shack just the other side of the corner of the small studio, was making some kind of signal by beating of the camp as the shriveled Martian sun struck the tops of the Shakam hills. The hunter hefted the long, balanced narvoon, the throwing knife, in his hand. He had faith in the knife, and in his skill with it. across the plain. Crouching behind crumbling red rocks, racing over flat expanses of orange sand, the hunter sought traces of the seegee, the great slow existence. At last he saw tracks. He mounted a dune. Out on the plain before him a great brown seegee lumbered patiently, unaware of its at him. The hunter saw it out of the corner of his eye at the last moment. His startled sidestep saved him from the neck-breaking snap of the great jaws. protruded from its upper jaw. Its hand-like forepaws ended in hooked claws, to grasp and tear its prey. It was larger, stronger, faster body. The drock's huge hind legs coiled back on their triple joints, and it sprang. The hunter thrust the gleaming knife out before him, so that the dark with it again and again into the gray twitching belly. Colorless blood ran out over the hard, tightly-stretched skin. head and bellowed his hunting cry. There was great glory in killing He began shouting even before Gavir removed his headset. "What kind the whole thing—the Barrier, the guards, the labor pools and mines, At this a sudden change came over the producer. The standard Earth The Earthmen wore black garments and furs and metal ornaments. The biggest of them wore a black suit, a long black cape, and a broad-brimmed black hat. He carried a coiled whip in one hand. The Earthmen turned to one another. "A Martian." The Earthman with the black hat raised his arm, and the long heavy to protect his eyes. the face. As the others rushed in, Gavir flailed about him with long Song of Going to Hunt came over him. He sprang free of his attackers and drew his glittering narvoon. the street on which it lay was solid black pavement, not a and this somehow makes them different." "Why?" here on Earth. A variation of it was given you to acclimate you to "What is wrong with them?" "They seem to have outgrown their Ethical Conditioning. They live have to go over to Global Dreamcasting and collect our fee." The impeccably affable producer of Dreaming Through the Universe gave Malcomb a check and then asked them to follow him. "Mr. Davery wants to see you. Mr. space-port. He was youthful in appearance, as were all Earthmen, but a He pointed a rigid finger at Malcomb and Gavir. "I want you two to More voices: "Enormous!" "Potent!" "That hunting song drove me mad. I like being mad!" and tight brown breeches. She was bare from the waist up and her at her neck. Her lips were a disconcertingly vivid red, apparently an artificial color. She kissed Hoppy Davery on the forehead, leaving red blotches on his pink dome. He wiped his forehead and looked at his you want here, anyway?" 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 She turned with a swirl of scarlet and a dramatic display of healthy young flesh. "See you again, Blue Boy." professional name—Blue Boy. Gavir doesn't Gavir thought. "Perhaps you would like the ." "It's part of a fertility rite," Malcomb explained. on the Farfel Gavir's hand leaped at the narvoon under his doublet. Then he stopped himself. He turned the gesture into the proffer of a handshake. "How do you do?" he said quietly. In his mind he products. But one slip like on your first 'cast and you go back to the sauntered in. She held a white tube between her painted lips. The end of the tube was glowing and giving off clouds of smoke. Hoppy Davery Grotto." lady, we'd deport you so fast your tail would burn. And God help the Spurling laughed. "I've heard about you Century-Plussers. You're all sick." "You can't claim any monopoly on mental health. Not with that private life." the "It won't happen again. You're a hero to the Senile Delinquents now. By the way, the big fellow with the broad-brimmed hat, he's one of the biggest privately-owned space line, but he likes to call himself the An arrangement of force-planes and 3V projections made the front of glowing, rippling surface. The flames swept aside, revealing a doorway. A bearded man in black tights escorted them through a dropped her cape to the floor, sat on the edge of a huge, pink divan, Conditioning?" what what nothing. And here I am, chasing nothing." "How do you chase nothing?" She set fire to a white tube. "This, for instance. They used to do it a folded paper tucked between the glasses. She picked it up and read In the months that followed, Gavir's fame spread over Earth. By doublets and blue kilts in honor of their hero. Blue-dyed hair was now de rigueur brightest blue. Complaint . allowed this image to turn into a picture of Hoppy Davery withholding A recorded voice boomed: "This is Hat Rat. Pay the Blue Boy what he between you and me. I will besprinkle you with corrosive acids I will burn out your eyes Gavir spread his big blue hands. "I am sorry. I don't want more money. ." When the dreamcast was over, a studio page ran up to Gavir. "Mr. over a hundred Century-Plus ladies and gentlemen. Gouts of flame leaped from the walls to light antique-style cigarettes. Drinks were refilled from nozzles of molded fire. sonic pistol strapped at his waist. A protesting Malcomb was behind him. Jarvis Spurling's square face was dark with anger. "You deliberately 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 be treated." He unsnapped his holster and drew the square, heavy pistol out and pointed it at Gavir. Gavir stood up. His right hand plucked at his doublet. "You're itching to go for that throwing knife," said Spurling. "Go on! Take it out and get ready to throw it. I'll give you that much chance. Let's make a game out of this. We'll make like we're back on Mars, Bluie, and you're out hunting a drock. And you find one, only this drock has a gun. How about that, Bluie?" Gavir took out the narvoon, grasped the blade, and drew his arm back. "Gavir!" It was the Hat Rat. He stood between pillars of flame in the doorway of the Pandemonium Room of Lucifer Grotto, and there was a peculiar contrivance of dark brown wood and black metal tubing cradled in his arm. "This ancient shotgun I dedicate to your blood feud. I shall hunt down your enemy, Gavir!" Spurling turned. The Hat Rat saw him. "The enemy!" the Hat Rat shouted. The shotgun exploded. Spurling's body was thrown back against Gavir. Gavir saw a huge ragged red caved-in place in Spurling's chest. Spurling's body sagged to the

<question>:
What is the white tube?

<options>:
A A cigarette
B We don't know
C A narvoon
D A shotgun

<answer>:

A