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

<passage>:
about the flight tomorrow." The young spaceman's eyes were puzzled, hurt. "But Ninon, I've told you before ... there is so much of you that I want to remember ... so little from him. But he blundered on. "... or very old, no longer the Ninon I know ... oh, all right. But you know all this already. We've had space flight for years, but only rocket-powered, restricting us to our own system. Now we have a new kind of drive. Theoretically we can travel faster than light—how many times faster we don't know yet. I'll start finding out tomorrow, with the first test flight of the ship in which the new drive is installed. If it works, the universe is ours—we can go anywhere." Again the young spaceman hesitated. "We ... we don't know, yet. We think "... When you travel faster than light. Is that it?" Ninon said, "You'll never make that flight without me.... Watch!" Swiftly she pushed buttons again. The room darkened, as before. Curtains at one end divided and rustled back, and a glowing screen sprang to life contrary, my proud and impetuous young spaceman, I have much to gain, more than you could ever understand. When it was announced that you were Space Research knew that you had not...." "I see. That's why you recorded my visit tonight. But I leave in less affects the success of the flight." The young spaceman's face was white and stricken as he stared for long moments, wordless, at Ninon. Then in defeated tones he said, "You through the door and hurried him along the hall and out into the street where his car waited. "We must hurry," she said breathlessly. "We can get to the spaceship ahead of schedule, before your flight partner arrives, and be gone from Earth before anyone knows what is happening. I'll be with you, in his "And if the clock went away from Earth faster than the speed of light, "Then if people travel at the speed of light they won't get any older?" Earth they appear not to. But it's a matter of relativity...." travel faster than light, a lot faster, they'll grow younger, won't his gaze a curious mixture of amusement and pity. Then, "Come on," he said flatly, turning to lead the way to the gleaming space ship which poised, towering like a spire, in the center of the blast-off basin. And not possess. A sudden chill of apprehension rippled through her, and almost she turned back. But no ... there was the ship! There was youth and beauty frown again. And after a few years she could make the trip again ... and again.... The space ship stood on fiery tiptoes and leaped from Earth, high into the heavens, and out and away. Past rusted Mars. Past the busy asteroids. Past the sleeping giants, Jupiter and Saturn. Past pale Uranus and Neptune and frigid, shivering Pluto. Past a senseless, flaming comet rushing inward towards its rendezvous with the Sun. And on out of the System into the steely blackness of space where the stars were hard, burnished points of light, unwinking, motionless The yammering rockets cut off, and the ship seemed to poise on the ebon lip of a vast Stygian abyss. "Then make it go faster!" she screamed. "And faster and faster—hurry! What are we waiting for?" The young spaceman swivelled about in his seat. He looked haggard and drawn from the strain of the long acceleration. Despite herself, Ninon still there. The light drive! She watched through the ports. The motionless, silent stars were moving now, coming toward them, faster and faster, as the ship swept out of the galaxy, shooting into her face like blazing pebbles from a giant slingshot. looked back behind them—and saw shining specks of glittering blackness falling away to melt into the sootiness of space. She shuddered, and knew without asking that these were stars dropping behind at a rate greater than light speed. "Now how fast are we going?" she asked. She was sure that her voice was when they would land back on Earth and she could step out in all the springy vitality of a girl of twenty. And then as she watched through the ingenious ports she saw the stars of the far galaxies beginning to wheel about through space, and she knew that the ship had reached the halfway point and was turning to speed back through space to Earth, uncounted light-years behind them—or before them. And she would still continue to grow younger and younger.... She gazed at the slightly-blurred figure of the young spaceman on the far side of the compartment, focussing her eyes with effort. "You are the young spaceman, turning him into a motionless, glowing figure which rapidly became misty and wraith-like, at last to disappear, leaving only a swirl of sparkling haze where he had stood. This too disappeared as its separate particles drifted to the metallite walls of the space ship, discharged their energy and ceased to sparkle, leaving only a thin film of dust over all. The light drive cut off, and the great ship slowly decelerated as it found its way back into the galaxy from which it had started. Found its way back into the System which had borne it. Ninon watched through the port as it slid in past the outer planets. Had they changed? No, she could not see that they had—only she had changed—until Saturn loomed up through the port, so close by, it looked, that she might touch it. behind. Next would be Mars.... But what was this? Not Mars! Not any planet she knew, or had seen before. Yet there, ahead, was Mars! A new planet, where the asteroids had been when she left! Was this the same system? Had there been a mistake in the calculations of the scientists and engineers who had plotted the course of the ship? Was something wrong? died away—and the ship—and Ninon—rested, quietly, serenely, while the rocket tubes crackled and cooled. The people outside gathered at a safe distance from it, waiting until they could come closer and greet the brave passengers who had voyaged through space from no one knew where. There was shouting and laughing and talking, and much speculation. "The ship is from Maris, the red planet," someone said. And another: "No, no! It is not of this system. See how the hull is pitted—it has traveled from afar." An old man cried: "It is a demon ship. It has come to destroy us all." A murmur went through the crowd, and some moved farther back for safety, watching with alert curiosity. Then an engineer ventured close, and said, "The workmanship is similar to that in the space ship we are building, yet not the same. It is obviously not of our Aerth." And a savant said, "Yes, not of this Aerth. But perhaps it is from a parallel time stream, where there is a system with planets and peoples like us." Then a hatch opened in the towering flank of the ship, and a ramp slid forth and slanted to the ground. The mingled voices of the crowd attended it. The fearful ones backed farther away. Some stood their last the crowd surged forward again. Among them were a youth and a girl who stood, hand in hand, at the foot of the ramp, gazing at it and the ship with shining eyes, then at each other. She said, "I wonder, Robin, what it would be like to travel through far space on such a ship as that." He squeezed her hand and said, "We'll find out, Nina. Space travel will scientists say that if one could travel faster than the speed of light one could live in reverse. So when we get old we'll go out in space, They were puffing from the rush of their excitement. "There is no one alive on the ship," they cried. "Only an old, withered, white-haired lady, lying dead ... and alone. She must have fared long and far to have lived so long, to be so old in death. Space travel must be pleasant,

<question>:
Had any other civilization discussed in the story discovered space travel?

<options>:
A No, only Earth
B There was one other civilization that Earth knew had space travel
C Space travel was known to exist in several other galaxies
D Other spaceships were seen on the flight, suggesting yes

<answer>:

A