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 was so far away that it wasn't visible. Even the vast distance did not mean that isolation could endure forever. Instruments within the ship intercepted radio broadcasts and, within the hour, early TV signals. translating the major languages. The history of the planet was tabulated as facts became available. The course of the ship changed slightly it was not much out of the way to swing nearer Earth. For days the two within the ship listened and watched with little soon. "We've got to make or break," said the first alien. "You know what I'm in favor of," said the second. 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." 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 "Too bad," said Bal. "We'll just have to forget there ever was such a planet as Earth." "Could you? Forget so many people?" intently. "Very much like ourselves," quite odd, they seem exactly like "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 we can do about it." "There is. We can give them their entire history. We can't begin to undo the effect of the big bomb." 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 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. worse than I imagined." "In what way?" "Well, we knew they had the big bomb. Atmospheric analysis showed that as far away as we were." "I know." "We also knew they could deliver the big bomb, presumably by some sort of aircraft." "That was almost a certainty. They'd have no use for the big "What's worse is that I now find they also have missiles, range one thousand miles and upward. They either have or are near a primitive form of space travel." "Bad," said Ethaniel. "Sitting there, wondering when it's going to hit them. Nervousness could set it off." "It could, and the missiles Our machines translate "You could do that and you'd "No. We can't help them," said Ethaniel. "There is nothing we can do for them—but we have to It was longer than that before 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 southern plains were green, the oceans and much of the northern hemisphere was glistening white. Ragged clouds covered the pole, and a dirty pall spread over the mid-regions of the north. "Nor I," said Bal. "We're going 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 take advantage of our physical "If we could I'd be all for it. But these people are rough and 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." "None. We leave the ship here and go down in separate landing craft. You can talk with me any communications, but don't unless you have to." "They can't intercept the beams we use." "They can't, and even if they them to think that we don't "I get it. Makes us seem better than we are. They think we know "If we're lucky they'll think Bal looked out of the port at the planet below. "It's going to be cold where I'm going. You too. Sure we don't want to change our plans and land in the southern hemisphere? It's summer there." that holiday you mentioned. We'll be running straight into it. That won't help us any." "I know, they don't like their "You ought to know. You're running this one." Bal looked 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 any way." 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," switched a monitor screen until he looked at the slope of a mountain. It was snowing and men were cutting small green trees in the snow. "I've thought of a trick." "If it saves my neck I'm for was thinking of: instead of hiding the ship against the sun where there's little chance it will planet and light it up." "They can't imagine that we'd light up an unmanned ship," said Ethaniel. "Even if the thought 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 Earth will see it." Later, with the ship in position, glowing against the darkness of space, pulsating with light, Bal said: "You know, I feel better about this. We may "It's not we who need help, but the people of Earth," said Ethaniel. that he entered a small landing craft, which left a faintly luminescent trail as it plunged toward Earth. As soon as it was safe to do so, Bal left in another craft, heading for the other side of the planet. And the spaceship circled Earth, unmanned, blazing and pulsing with light. No star in the winter skies of the planet below could equal it in brilliancy. Once a man-made satellite came near but it was dim and was lost sight of by the people below. During the day the ship was visible as of a star and brought near Earth to illuminate it. Never, or seldom, had Earth seen anything like it. 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 he said, rustling. "Me too, but mostly I'm cold," said Bal, shivering. "Snow. Nothing but snow wherever I went. Miserable climate. And yet you had me go out walking after that first day." one day I noticed that the next from destroying themselves." "It's as much as we can expect," said Ethaniel. "They may knelt in the snow and called me an angel." "Something like that happened 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." knew exactly how he looked. In their paintings they had pictured out. Some creature of their folklore I suppose. You know, except for our wings they're very much bound to resemble ours." 1960. Extensive research did not uncover any evidence that the U.S.

<question>:
How did the climate affect the humans' perception of the aliens?

<options>:
A The cold pushed the aliens to fly a bit, exposing their wings.
B The aliens seemed extra out of place in the cold.
C The cold was what allowed their ships to glow and look powerful.
D The cold made it harder for the aliens to travel on the surface.

<answer>:

A