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

<passage>:
John Crownwall as he strode live in peace. "The Sundans, for example, prehensile fingers, as he ignored the heavy gravity and heavier air of though they took the rule of the the unfamiliar planet. he felt distinctly unhappy. Crownwall to Crownwall. "You broke our toward the mighty entrance gate of the palace. His manner demonstrated an elaborate air of unconcern that he felt sure was entirely wasted on these monsters. Crownwall and unexpectedly to Crownwall, the threatening crowd dropped back fearfully, so that he walked the last fifty meters alone. Crownwall all but sagged with gesture to be interpreted correctly, to feel safe, and we will guarantee them an equal share in the government of the Galaxy." "Bunk," said Crownwall. but he assumed that his silence would be. He was correct. Crownwall. "I want to see Ffallk." arrived from Earth to talk to him. He'll summon me fast enough. Meanwhile, my highly polished Crownwall sat on the steps, "And if you try to move anywhere drive, we can follow you, and destroy any planet you choose to land on. You would not get away else, by your clumsy distorter from inside the palace, obviously trying to present an air of strolling nonchalance. He gestured fluidly said to Crownwall. "Follow me. His Crownwall stamped out his smoke and ambled after the hurrying courtier along tremendous corridors, through elaborate waiting rooms, under guarded doorways, until he was finally bowed through a small curtained arch. "Nor do I," consented Crownwall. They examined Crownwall with Crownwall to still Crownwall's immediate in his pockets. "That's hardly possible," he said. "It was only decided yesterday, back on Earth, that I would be the one to make the trip here. Even if you could spy through buildings on Earth from space, which I doubt, your Crownwall nodded. "I don't see why not. Well, then, let me tell you that we don't travel in space at all. That's why I didn't show up on any of your long-range detection instruments. Instead, we travel in time. Surely any race that has progressed as far as your own must know, at least theoretically, that time travel is entirely possible. After all, we knew it, and we haven't been around nearly as long as you from Earth to break through our blockade and come here. Most of my advisors—even Ggaran here—thought Crownwall. "If you wanted someone who tried to work any changes in his own past would be almost certain to end up finding himself never having been born. So we don't do any meddling. What we have discovered is a way not only of moving back into the past, but also of making our own choice of spatial references while we do it, at will. "For example, to reach this planet, I went back far enough, using to Crownwall. "If you couldn't to move with Earth a little more than a third of the way around this spiral nebula that is our Galaxy. Then I shifted my frame of reference Earth as the spatial referent, "Then of course, as I continued to move in time, the whole Galaxy moved spatially with reference to my own position. At the proper instant "I'm listening," said Crownwall. Then I was stationary in the Galaxy, and as I continued time traveling, Master Race." "It would hardly be an equal it to the present. So here I am. It was a long way around to cover a net distance of 26 light-years, but it was really very simple. "And there's no danger of meeting future—I can't stop in them." "Are you sure that you haven't Crownwall shrugged. "So?" time I went back to my ship and drove it home to Earth to make my that they would some day come to be numbered among the Servants of the Emperor. So we let you alone, in order that you could develop in your own way, until you reached a high enough civilization against her unknown enemy. us." He climbed into the chair beside Ffallk. The bearers trotted along at seven or eight kilometers an hour, carrying their contraption develop. It took the quickest of them just under a million years. One such race we left uncontrolled went. When they passed through the "You Earthlings, in defiance of all expectation and all reason, have exploded into space. You have developed space of time. But even that isn't "When the Viceroy of the Seventy Suns," said the Viceroy of the Seventy Suns, "travels in state, no one but my own entourage is permitted Crownwall. "I was to Crownwall. an adventure that had taken place little more than ten years before. in space, about forty thousand kilometers above the Earth. It had been manned by a dozen adventurous as to remain on the street after His Effulgence's entourage arrived." He turned to one of the bowmen who ran beside the sedan in Earth's history, and, for the twelve, the stars had winked out. The men of Earth had decided tradition." His Effulgence beckoned to the thousands of miles around, in a ravening burst of raw energy. So the drive had been used for and spoke again to Crownwall. time has any meaning under such circumstances, they had flickered back into normal space, in the vicinity had headed for that planet confidently and unsuspectingly, using the ion drive. were still several planetary diameters from their destination, they had been shocked to find more Star Seeker , and had then tried to herd it away from the planet it had been heading toward. swiftly. Crownwall recalled the discussion—the distorter drive, and they had beaten the odds. On the distorter drive, Crownwall. they had returned to Earth as swiftly as they had departed. Earth had to His Effulgence and to Crownwall during the trip, without interrupting the smooth progress were served immediately prepared for war continued to run—without food, drink or, except for Ggaran, evidence of fatigue. After several hours of travel, following Crownwall's directions, the You knew that you could have destroyed which he had concealed his small transportation machine. The machine, for spatial mobility, was not only yourself, but also and too foolhardy to be believed. temporal translation and coordination selection systems combined, but it had the great advantage of emitted no mass or radiation. After elaborate and lengthy farewells, Crownwall climbed into his machine and fell gently up until he was out of the atmosphere, before starting his enormous journey through time back to Earth. More quickly than it had taken him to reach his ship from the palace of His Effulgence, he was in the Council and uncontrolled in the Galaxy. Once was enough for that." report on his trip to Vega. you. We could only destroy you." "That old fool on Sunda, the Emperor, decided that we should "that you might be useful to me—that is, that we might be useful to each other. I traveled halfway across the Galaxy to meet him, to convince him that it would be sufficient just to quarantine you. we had done our job. "With his usual lack of imagination, he felt sure that we were safe from you—after all, there was no way for you to get off the planet. Even if you could get down to the Crownwall. "Our enemies are all would dream up some device or other, head out into space, and show up on our planet. So I've been waiting for you, and here you are." "It was the thinking of a genius," murmured Ggaran. "Alone," he said, and unconsciously repeated Marshall's words: the table by himself. He shivered involuntarily, and then leaped to his feet to follow after them. Loneliness, he found, was something that he couldn't face alone. —L. J. STECHER, JR. to their position of power. Our race is much older than theirs. We were Transcriber's Note: for revenge. And now that you have entered space, that asked Crownwall, "how does the at a soothing wave from His Effulgence. "War in space is almost an impossibility," said the aged ruler.

<question>:
Which is not true about why Crownwall was able to travel to Vega undetected?

<options>:
A He was not technically moving through space in a typical sense
B He employed technology unfamiliar to the Vegans
C His ship's drive does not give off the usual traceable signals
D He traveled into the future so as to not need to experience the distance travel himself

<answer>:

D