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 it wasn't visible. Even the isolation could endure forever. Instruments within the ship intercepted radio broadcasts and, and grammars and began translating the major languages. The history of the planet was the way to swing nearer Earth. soon. "We've got to make or break," said the first alien. "You know what I'm in favor of," said the second. who had spoken first. "The place 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 that big bomb." bomb can destroy them. Without their problems? They've had two world wars in one generation and that the third and final one in everything they do." "It won't take much," said Ethaniel. "The wrong diplomatic move, or a trigger-happy soldier could set it off. And it wouldn't 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 just have to forget there ever was such a planet as Earth." "Could you? Forget so many people?" "My memory isn't convenient," to look at them." Bal rustled, flicking the screen intently. "Very much like ourselves," he said at last. "A bit shorter perhaps, and most certainly incomplete. Except for the one thing they lack, and that's quite odd, they seem exactly like 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 seem defenseless, though I suppose they're not." "Tough," said Bal. "Nothing this way again." "A very long time. There's nothing in this region of space our people want," said Ethaniel. "And how long can Earth last? Ten years? Even ten months? The tension is building by the 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. "What's there to think? It's worse than I imagined." "In what way?" "Well, we knew they had the big bomb. Atmospheric analysis the big bomb, presumably "What's worse is that I now find they also have missiles, near a primitive form of space "Bad," said Ethaniel. "Sitting to hit them. Nervousness could set it off." "It could, and the missiles make it worse," said Bal. "What "Nothing worthwhile. I was "I wish I knew what to think. and news bulletins. I should go down and live among them, "No. We can't help them," said Ethaniel. "There is nothing we can do for them—but we have to before. We take the trouble to find out what a people are like and when we can't help them we feel bad. It's going to be that it." Earth. They no longer needed instruments to see it. The planet revolved outside the visionports. The southern plains were green, the oceans white. Ragged clouds covered the pole, and a dirty pall to have to go down there cold. And it will be cold." "Yes. It's their winter." "I did have an idea," said Bal. "What about going down as supernatural 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 differences." "If we could I'd be all for it. But these people are rough and desperate. They wouldn't be fooled by anything that crude." 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 have time for." "None. We leave the ship here and go down in separate landing craft. You can talk with me any "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 though we don't." "If we're lucky they'll think that." the planet below. "It's going to be cold where I'm going. You too. Sure we don't want to change "I'm afraid not. The great 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 I ought to know. Probably religious in origin. That so?" the people, and they're hard to pin down." "I see. I was thinking there down at the planet. Clouds were beginning to form at the twilight edge. "I hate to go down and leave the ship up here with 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 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," Ethaniel acknowledged. Now he the snow. "I've thought of a it." the ship against the sun where there's little chance it will 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." "That's thinking," said Bal, Earth will see it." Later, with the the darkness of space, pulsating 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 could equal it in brilliancy. Once Earth to illuminate it. Never, or seldom, had Earth seen anything up from Earth and joined the 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 he said, rustling. "Me too, but mostly I'm cold," said Bal, shivering. "Snow. Nothing but snow wherever I went. Miserable climate. And yet "From my own experience it 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," said Ethaniel. "They may "I'm not sure I want to," said Bal. "Say, what's an angel?" "Why?" people stopped to look. Some knelt in the snow and called me an angel." it upset me," said Bal. "I smiled at them and went about my business." He shivered again. "It was always cold. I walked out, but sometimes I flew back. I hope that was all right." "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 for our wings they're very much like ourselves. Their legends are bound to resemble ours." "Sure," said Bal. "Anyway, peace on Earth." Amazing Science Fiction Stories January 1960. Extensive research did not uncover any evidence that the U.S.

<question>:
Why is the Earth worse than the aliens imagine?

<options>:
A The Earth has missiles and is close to space travel.
B The humans are rough and desperate.
C A meteor shower could be interpreted as an enemy attack by the humans' clumsy instruments.
D The humans don't like aliens.

<answer>:

A