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

<passage>:
This little alien beggar could dictate his own terms, but how could he—and how could anyone find out what those terms might be? The flivver descended vertically toward the green planet circling the It was a spaceship, but not the kind men had once dreamed about. The slapped together out of sheet metal and insulation board, and it sold, fully equipped, for $15,730. It didn't behave like a spaceship, either. As it hurtled down, its speed increased with dramatic swiftness. Then, at the last instant before impact, it stopped. Just like that. less than that of Mercury and yet a gravitational pull as great as Earth." Grampa started to say something, but an 8-year-old boy looked up from the navigator's table beside the big computer and said, "Well, gosh, "deserves anything anybody could say about him. There's no such thing, Junior. You ought to know by now that gravitation is the effect of the curving of space-time around matter. Einstein proved that two hundred years ago." "Go back to your games, Grampa," Fred said impatiently. "We've got work go searching for uranium and habitable worlds all through this deadly before we left, you bought a hundred-year contract with that Life-Begins-At-Ninety longevity company." Earth, didn't you? What's the game?" Within it was the green horizon, curving noticeably. Four angled the picture in toward the ship, sweeping through green, peaceful woodland "Look!" he said suddenly. "This planet not only has flora—it has fauna." He rushed to the air lock. "Four!" Reba called out warningly. "It's all right, Reba," Four assured her. "The air is within one per cent of Earth-normal and the bio-analyzer can find no micro-organisms viable within the Terran spectrum." "What about macro-organisms—" Reba began, but the boy was gone impatiently. "Get it out!" Four's eyes widened farther. "But Fweep's my friend." "Nonsense!" Joyce said sharply. "Earthmen don't make friends with aliens. And that's nothing but a—a blob!" few low-grade iron deposits and that's it." "Then what makes this planet so heavy?" Reba asked. Junior shrugged helplessly and collapsed into a chair. "Your guess is rich. We were going to find radioactives and retire to Earth like billionaires. And all we've done is spent a year of our lives in this cramped old flivver—and we don't have many of them to spare!" She glared venomously at Grampa. "This planet. It's not big, but it's fertile and it's harmless. As real estate, it's worth almost as much as if it were solid uranium." "A good thing, too," Junior said glumly, "because this looks like the end of our search. Short of a miracle, we'll spend the rest of our lives right here—involuntary colonists." Joyce spun on him. "You're joking!" she screeched. The land of the Fweep turned slowly on its axis. The orange sun set and rose again and stared down once more at the meadow where the improbable spaceship rested on its improbable stern. The sixteen Earth hours that the rotation had taken had changed nothing inside the ship, either. If we get back to Earth," he amended. "You can't be Four's father. All over the Universe, gravity is the same, and if it's gravity, the polarizer will polarize it." Before we can discover the answer to that, we'll have to know more what's the theory behind polarization?" or ellipses." The faces were still blank and unillumined. "Gravity is similar to light," he pressed on. "In the absence of around itself. That's how we've always known it until the invention of spaceships and later the polarizer. The polarizer polarizes gravity into a straight line. That makes the ship take off and continue accelerating until the polarizer is shut off or its angle is shifted." longer. "That's just nonsense! You all know it. Grampa's no genius. He's just a tinkerer. One day he happened to tinker out the polarizer. He doesn't know how it works any more than I do." dragging a battery behind it. I guess it's still going. Ought to be out near the Horsehead Nebula by now. Luckily, I remembered how I'd wound it." "Why won't the ship work then, if you know so much?" Joyce demanded "We're stuck," Reba said softly. "We might as well admit it. All we can do is set the transmitter to send out an automatic distress call—" "Which," Joyce interrupted, "might get picked up in a few centuries." "And make the best of what we've got," Reba went on, unheeding. "If we look at it the right way, it's quite a lot. A beautiful, fertile world. Earth gravity. The flivver—even if the polarizer won't work, there's the resynthesizer it will keep us in food and clothes for years. By we won't have to stop with one child. We can have all the babies we want." "You know the law: one child per couple," Joyce reminded her frigidly. "You can condemn yourself to exile from civilization if you wish. Not me." "Here." Four came through the airlock and trudged across the room, carrying a curious contraption made of tripod legs supporting a "Fweep?" it queried hopefully. "Not now," said Four. "Where've you been?" Reba asked anxiously. "What've you been doing?" "I've been all over Fweepland," Four said wearily, "trying to locate its center of gravity." "Well?" Fred prompted. "It shifts." "That's impossible," said Junior. "Not for Fweep," Four replied. unbelievingly. Four nodded. "And that 'skin' of his—whatever it is he uses for skin—is more efficient in stopping particle emissions than several feet of lead." something with him. It's preposterous that we should be detained here at the whim of a mere blob!" he's got to have for one reason or another, so he just naturally bends the space-time continuum around him—conscious or subconscious, I don't know. But protoplasm is always more efficient than machines, so the flivver won't move." we'll just have to do away with it." "How?" asked Four. "Fweep's skin is pretty close to impervious and and wait for that thing to die?" "We'd have a long wait," Four observed. "Fweep is the only one of his kind on this planet." "Well?" "Probably he's immortal." Reproduction is nature's way of providing racial immortality to mortal creatures." something. He couldn't just have sprung into being as he is now." "Maybe he developed," Four offered. "It seems to me that he's bigger than when we first landed." "He must have been here a long, long time," water, which a planet this size ordinarily would have lost by now." "Makes you think, doesn't it?" Grampa said, looking at Fweep benignly. "Maybe the whole theory of gravitation is cockeyed. Maybe there's a Fweep for every planet and sun, big and little, polarizing the gravity in circles, and the matter business is not a cause but a result." "What I can't understand," Junior said thoughtfully, "is why the polarizer worked for a little while when we landed—long enough to keep It's out of the question. If that's the only way we can leave this planet, we'll stay here until Four has a beard as white as Grampa's!" the cannibals and the missionaries. We can't leave Fweepland because

<question>:
What is known about the planet that they are stranded on?

<options>:
A It has no plant life
B They spotted it while transiting Earth’s solar system
C It could be anywhere in the universe
D It is several days travel from Earth

<answer>:

C