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

<passage>:
Tr'en were an efficient people. All the preliminary reports had agreed An invitation, the Comity was sure, which the Tr'en would not accept. even a folder of tourist pictures. The Wonders of Tr'en, according to his captors had left him with a full stock of food concentrates. But he was almightily bored, and about ready to tell anything to The Tr'en was tall, and slightly green. The Tr'en regarded him narrowly through catlike pupils. "You are "What do you want with me?" Korvin said. The Tr'en speech—apparently across. It reminded him of some of the mathematical metalanguages he'd dealt with back on Earth, in training to you," Didyak said, "by the Ruler. The Ruler wishes to talk with you." It wasn't quite "talk" and Didyak had used a specific meaning, roughly: "gain information from, by peaceful and vocal means." Korvin filed it away for future reference. "Why did the Ruler not come to me?" Korvin asked. "The Ruler is the Ruler," Didyak said, slightly discomfited. "You are to go to him. Such is his command." command of the Ruler," he said—another ritual. Everybody obeyed the command of the Ruler. If you didn't, you never had a second chance to try. But Korvin meant exactly what he'd said. He was going to obey the commands of the Ruler of the Tr'en—and remove the Tr'en threat from the rest of the galaxy forever. That, after all, was his job. contrast of the Tr'en themselves were figured in. He wasn't defying the Ruler, either. He was just answering questions. The Tr'en liked to have everything clear. They were a logical race. The Ruler had started with Korvin's race, his name, his sex—if any—and whether or not his appearance were normal for humanity. Korvin was answering the last question. "Some men are larger than I children ," he volunteered helpfully. "Approximately?" the Ruler growled. "We ask for precision here," he said. "We are scientific men. We are exact." Korvin nodded hurriedly. "Our race is more ... more approximate," he "Undoubtedly," Korvin agreed politely. "I'll try to do the best I can for you." "You will answer my questions," the Ruler said, "with exactitude." He paused, frowning slightly. "You landed your ship on this planet," he went on. "Why?" have tests for such matters?" "We do," the Ruler told him. "We are an exact and a scientific race. A machine for the testing of truth has been adjusted to your physiology. It will be attached to you." The Tr'en, under other circumstances, would have been a valuable ?" the Ruler asked. A chulad "I am not," he said. The Ruler looked to his technicians for a signal, and nodded on receiving it. "You will tell an untruth now," he said. "Are you standing or sitting?" the training. He hoped they were right. The Ruler was frowning at him. Korvin did his best to look receptive. "Why did you land your ship on this planet?" the Ruler said. "My job required it," Korvin said. "disposed of for all time." "No," he said. "What else does your job entail?" the Ruler said. alive." The Ruler roared. "Do not waste time with the obvious!" he shouted. "Do not try to trick us we are a logical and scientific race! Answer the truth, just as the Ruler is the Ruler?" "I—" The Ruler stopped himself in mid-roar. "You try to confuse the Ruler," he said at last, in an approximation of his usual one. "But the Ruler will not be confused. We have experts in matters of logic"—the Tr'en word seemed to mean right-saying —"who will advise the Ruler. They will be called." There was a short silence. The expert beamed. He examined the indicators of the lie-detector with great care. "What is your plan?" he said at last, in a conspiratorial whisper. "To answer your questions, truthfully and logically," Korvin said. in a awed tone. "Thus, you must be a traitor to your native planet. You must want us to conquer your planet, and have come here secretly to aid us." only logical deduction. But it happened to be wrong. "The name of your planet is Earth?" the Ruler asked. A few minutes had passed and certainly a planet had no name. People attached names to it, that was all. It had none of its own. "Yet you call it Earth?" the Ruler said. "I do," Korvin said, "for convenience." "Do you know its location?" the Ruler said. "Not with exactitude," Korvin said. "And you will tell us about it?" the Ruler went on. "I will," Korvin said, "so far as I am able." "We will wish to know about weapons," the Ruler said, "and about plans and fortifications. But we must first know of the manner of decision on this planet. Is your planet joined with others in a government or "It is," Korvin said. "Who is it that governs?" the Ruler said. The key question had, at last, been asked. Korvin felt grateful that the logical Tr'en had determined to begin from the beginning, instead of going off after details of armament first "The planet from which you come is part of a system of planets which are governed, you have said," the Ruler went on. The Ruler turned to a group of his experts and a short muttered conversation took place. At its end the Ruler turned his gaze back to "Then you will suffer unpleasant consequences if you describe it to us?" the Ruler went on. were no longer moving and speaking with calm assurance. The plan was taking hold. The Ruler had finished his conference. "You are attempting again to confuse us," he said. Korvin shook his head earnestly. "I am attempting," he said, "not to confuse you." "Then I ask for an answer," the Ruler said. The Ruler hesitated, then nodded. "Ask it," he said. "We shall answer it if we see fit to do so." Korvin tried to look grateful. "Well, then," he said, "what is your from a knot of Tr'en, inclined his head in Korvin's direction, and began. "Our government is the only logical form of government," he said in a high, sweet tenor. "The Ruler orders all, and his subjects obey. In this way uniformity is gained, and this uniformity aids in the speed of possible action and in the weight of action. All Tr'en act instantly in the same manner. The Ruler is adopted by the previous Ruler in this way we are assured of a common wisdom and a steady judgment." "You have heard our government defined," the Ruler said. "Now, you will define yours for us." Korvin shook his head. "If you insist," he said, "I'll try it. But you won't understand it." The Ruler frowned. "We shall understand," he said. "Begin. Who governs you?" wasn't making any sense. "I told you you wouldn't understand it," he said. "It is a defect in your explanation," the Ruler almost snarled. "My explanation is as exact as it can be," he said. The Ruler breathed gustily. "Let us try something else," he said. "But with no single ruler to form policy, to make decisions—" the rule of the people. There is no need for another ruler." One of the experts piped up suddenly. "The beings themselves rule each particular plan. That, and the political structure of the Tr'en. The same lack of insight let the Tr'en subconscious work on his the Tr'en aren't about to come

<question>:
Are there indications that the Tr'en would be interested in attacking Earth? Why or why not?

<options>:
A Both A and C are correct.
B No, because Korvin sends a mission back to Earth Central saying that the Tr'en won't come marauding out into space.
C Yes, because the expert mentions the idea of conquering Earth with Korvin's aid.
D Yes, because the ruler says the he wants to know about Earth's weapons, plans, and fortifications.

<answer>:

D