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

<passage>:
HB73782. Ultroom error. Tendal 13. Arvid 6. Kanad transfer child. Around the corner and after the man came a snarling mongrel dog, eyes bright, teeth glinting in the sunlight. The man did not turn as the dog threw himself at him, burying his teeth in his leg. Surprised, the seemed off balance and he backed up confusedly in the face of the snapping jaws. Then he suddenly turned and walked away, the dog at his heels. "I tell you, the man said he was my brother and he made me think he forward on his face. The figure of a woman ran from the house, retrieved the now squalling "But there must be! I tell you I shot these men who posed as "I wonder why they want our baby? He's just like any other baby. We don't have any money. We couldn't pay a ransom." gurgled with delight at the change in environment. This peaceful scene was disturbed by a speeding car in which two men were riding. The car roared up the street, swerved toward the parkway, "That's odd. The man who accosted Mrs. Laughton in the afternoon was bitten by their dog. Later that night she said she shot the same man in the chest. Since the scars are healed it obviously couldn't be the same man. But there's a real coincidence for you. And speaking of the dogbite, the Laughton dog died that night. His menu evidently didn't agree with him. Never did figure what killed him, actually." "Any record of treatment on the man she shot?" It was the chief's turn to shake his head. "Your guess is as good as mine. There are a lot of angles to this case none of us understand. It looks deliberate, but where's the motive?" "What does the man have to say?" gives you the creeps." The states attorney leaned back in his chair. "Maybe it's a case for an alienist." to take delight in answering questions—sort of anticipates them and has the answer ready before you're half through asking." "Guess you're right. Well, Mr. Smith won't think it's so funny when we hang criminal negligence or manslaughter on him. By the way, you've checked possible family connections?" Arvid 6—for John Smith Arvid 6—had lain in that position for Arvid 6 knew Tendal 13 had materialized and was somewhere in the "I'm really sorry about that," Arvid 6 said. You know the instructions. Just because you work in the Ultroom don't get to thinking human life doesn't have any value. We wouldn't be here if it hadn't. But to unnecessarily kill—" The older man shook his head. "You could have killed yourself as well and we'd never get the job done. As it is, you almost totally obliterated me." Tendal 13 brand of humor I have grown to despise." "You didn't have to come along at all, you know," Arvid 6 said. "How well I know! How sorry I am that I ever did! It was only because I was sorry for you, because someone older and more experienced than you was needed. I volunteered. Imagine that! I volunteered! Tendal 13 reaches the height of stupidity and volunteers to help Arvid 6 go back He snorted. "I still can't believe I was ever that stupid. I only prove it when I pinch myself and here I am. "Oh, you've been a joy to be with! First it was that hunt in ancient Mycenae when you let the lion escape the hunters' quaint spears and we were partly eaten by the lion in the bargain, although you dazzled the hunters, deflecting their spears. And then your zest for drink when we were with Octavian in Alexandria that led to everybody's amusement but when her husband mistook me for you and you let him take me apart piece by piece—" "All right, all right," Arvid 6 said. "I'll admit I've made some mistakes. You're just not adventurous, that's all." "Shut up! For once you're going to listen to me. Our instructions specifically stated we were to have as little as possible to do with with them. If that's adventure, you can have it." Tendal 13 sat down wearily and sank his head in his hands. "It was you who conceived the idea of taking Reggie right out of his play pen. 'Watch me take that child right out from under its mother's nose' were your exact words. And before I could stop you, you did. Only you forgot an important factor in the equation—the dog, Tiger. And you nursed a dogbite most of the afternoon before it healed. And then you took your spite out on the poor thing by suggesting suffocation to it that night. "And speaking of that night, you remember we agreed I was to do the talking. But no, you pulled a switch and captured Martin Laughton's attention. 'I came as soon as I could, Martin,' you said. And suddenly hole in your back. We were both nearly obliterated that time and we didn't even come close to getting the child. "Still you wanted to run the whole show. 'I'm younger than you,' you said. 'I'll take the wheel.' And the next thing I know I'm floating in space halfway to nowhere with two broken legs, a spinal injury, concussion and some of the finest bruises you ever saw." These twentieth century machines aren't what they ought to be," Arvid 6 said. "You never run out of excuses, do you, Arvid? Remember what you said in the Ultroom when you pushed the lever clear over and transferred Kanad back 6,000 years? 'My hand slipped.' As simple as that. 'My hand slipped.' It was so simple everyone believed you. You were given no real punishment. In a way it was a reward—at least to you—getting to in." Tendal 13 turned and looked steadily and directly at Arvid 6. "Do you know what I think? I think you deliberately pushed the lever over as far as it would go just to see what would happen . That's how simple I think it was." Arvid 6 flushed, turned away and looked at the floor. "What crazy things have you been doing since I've been gone?" Tendal Arvid 6 sighed. "After what you just said I guess it wouldn't amuse you, although it has me. They got to me right after the accident before I had a chance to collect my wits, dematerialize or anything—you said we shouldn't dematerialize in front of anybody." alcohol in my blood, although I implanted a memory in them that I reeked of it." He laughed. "I fancy they're thoroughly confused." "And you're thoroughly amused, no doubt. Have they questioned you?" "And you amused yourself with him." "I suppose you'd think so." "Who do you tell them you are?" Tendal 13 shook his head. "I haven't heard. The transfers are getting "If it had been anybody but Kanad nobody'd ever have thought of going back after it. The life germ of the head of the whole galactic system sending him back beyond his original birth date—" Tendal 13 got up HB92167. Ultroom Error. Tendal 13. Arvid 6. Kanad transfer Arvid 6 rose from the cot and the two men faced each other. "Before we leave, Arvid," Tendal 13 started to say. "Exactly. Is that too much to ask after all you've done?" "I guess I have made mistakes. From now on you be the boss. I'll do whatever you say." Matthews," Tendal 13 told the jailer. several with no luck. Arvid 6, an amused set to his mouth and devilment in his eyes, watched laughed as he saw the jailer's eyes bulge. "Arvid!" Tendal 13 walked briskly through the door, snatched Arvid 6 by the

<question>:
Which term best describes the relationship between Arvid 6 and Tendal 13?

<options>:
A compulsory
B symbiotic
C complicated
D predatory

<answer>:

A