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

<passage>:
that left the Earth with a wing and a prayer. Earth vast distance did not mean that isolation could endure forever. Instruments within the ship intercepted radio broadcasts and, within the hour, early TV signals. Machines compiled dictionaries and grammars and began translating the major languages. The history of the planet was tabulated as facts became available. it was not much out of the way to swing nearer Earth. For days the two within the ship soon. "We've got to make or break," said the first alien. "You know what I'm in favor of," said the second. is a complete mess. They've never done anything except fight each other—and invent better weapons." "It's not what they've done," said Bal, the second alien. "It's what they're going to do, with bomb can destroy them. Without in everything they do." "It won't take much," said Ethaniel. "The wrong diplomatic move, or a trigger-happy soldier have to be deliberate. A meteor shower could pass over and their clumsy instruments could interpret it as an all-out enemy attack." "Too bad," said Bal. "We'll was such a planet as Earth." people?" "I'm doing it," said Bal. "Just give them a little time and they to look at them." intently. "Very much like ourselves," he said at last. "A bit shorter perhaps, and most certainly us. Is that what you wanted me to say?" "It is. The fact that they are an incomplete version of ourselves touches me. They actually we can do about it." "There is. We can give them "In a week we can't negate their entire history. We can't begin to undo the effect of the big bomb." nothing in this region of space our people want," said Ethaniel. "And how long can Earth last? "I suppose we can stop and look them over. We're not committing ourselves by looking." They went much closer to Earth, not intending to commit themselves. For a day they circled the planet, avoiding radar detection, which for them was not difficult, testing, and sampling. from the monitor screen. "Any "In what way?" "Well, we knew they had the the big bomb, presumably by some sort of aircraft." upward. They either have or are near a primitive form of space travel." to hit them. Nervousness could set it off." There's so little time," Ethaniel said. "Language isn't the difficulty. Our machines translate their languages easily and I've taken a cram course in two or three of them. But that's not go down and live among them, with them, play." "You could do that and you'd really get to know them. But that takes time—and we don't have it." "No. We can't help them," said Ethaniel. "There is nothing we can do for them—but we have to try." "Sure, I knew it before we before. We take the trouble to find out what a people are like and when we can't help them we they met again. In the meantime the ship moved much closer to Earth. They no longer needed instruments to see it. The planet revolved outside the visionports. the oceans to have to go down there cold. And it will be cold." "Yes. It's their winter." beings?" "Hardly," said Ethaniel. "A hundred years ago it might have worked. Today they have satellites. They are not primitives." "I suppose you're right," said Bal. "I did think we ought to take advantage of our physical differences." "If we could I'd be all for it. But these people are rough and other. We'll tell them bluntly what they'll have to do if they're going to survive, how they can keep their planet in one piece so they can live on it." "That'll go over big. Advice is always popular." "Can't help it. That's all we "None. We leave the ship here and go down in separate landing craft. You can talk with me any time you want to through our communications, but don't unless you have to." "They can't intercept the beams we use." "They can't, and even if they did they wouldn't know what to do with our language. I want them to think that we don't need to talk things over." "I get it. Makes us seem better than we are. They think we know exactly what we're doing even the planet below. "It's going to are the ones we have to reach to do the job." "Yeah, but I was thinking of that holiday you mentioned. We'll be running straight into it. That won't help us any." "I know, they don't like their holidays interrupted. It can't be helped. We can't wait until it's over." "I'm aware of that," said Bal. learn anything exact from radio and TV. Now it seems to be parties, and selling merchandise." "I see. It has become a business holiday." the people, and they're hard to pin down." "I see. I was thinking there might be some way we could tie ourselves in with this holiday. Make it work for us." "If there is I haven't thought of it." down at the planet. Clouds were no one in it." "They can't touch it. No matter how they develop in the next hundred years they still won't be able to get in or damage it in about. Down there, alone." "I'll be with you. On the other side of the Earth." "That's not very close. I'd like it better if there were someone in the ship to bring it down in a hurry if things get rough. They don't think much of each other. I don't imagine they'll like aliens any better." "They may be unfriendly," the snow. "I've thought of a trick." "If it saves my neck I'm for the ship against the sun planet and light it up." "Say, pretty good," said Bal. "They can't imagine that we'd light up an unmanned ship," said Ethaniel. "Even if the thought should occur to them they'll have no way of checking it. Also, they won't be eager to harm us with our ship shining down on them." the ship over where they can see it best and then I'll light it up. I'll really light it up." "Don't worry about that. They'll see it. Everybody on Earth will see it." Later, with the ship in position, glowing against the darkness of space, pulsating pull it off. Lighting the ship may be just the help we need." "It's not we who need help, but the people of Earth," said Ethaniel. "See you in five days." With Earth. As soon as it was craft, heading for the other side of the planet. And the spaceship circled Earth, unmanned, blazing and winter skies of the planet below a man-made satellite came near of a star and brought near Earth to illuminate it. Never, or In five days the two small landing craft that had left it arched up from Earth and joined the orbit of the large ship. The two small craft slid inside the large one and doors closed behind them. In a short time the aliens met again. "We did it," said Bal exultantly as he came in. "I don't know how we did it and I thought we I thought it might help you." "It did. I don't know why, but it did," said Bal. "Anyway, this agreement they made isn't the best but I think it will keep them from destroying themselves." "It's as much as we can expect," Bal. "Say, what's an angel?" "Why?" an angel." their paintings they had pictured him innumerable times. "I don't think it hurt us that so myself occasionally." "But you don't know what an angel is?" "No. I didn't have time to find out. Some creature of their folklore I suppose. You know, except like ourselves. Their legends are bound to resemble ours." "Sure," said Bal. "Anyway, peace on Earth." This etext was produced from Amazing Science Fiction Stories

<question>:
What is the aliens' goal on the surface of Earth?

<options>:
A They want to delay any wars until they can come back to help with backup
B They want to defuse the bombs
C They want to keep the humans from fighting and destroying themselves
D They want to officially connect the alien culture and the humans' culture

<answer>:

C