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

<passage>:
SECOND LANDING By FLOYD WALLACE A gentle fancy for the Christmas Season—an Earth was so far away that it was not much out of the way to swing nearer Earth. For days the two within the ship listened and watched with little "You know what I'm in favor of," said the second. "I can guess," said Ethaniel, who had spoken first. "The place is a complete mess. They've never 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." than a hundred light-years to go." "A week," said Ethaniel. "We can spare a week and still get there on time." "A week?" said Bal. "To settle their problems? They've had two world wars in one generation Ethaniel. "The wrong diplomatic move, or a trigger-happy soldier could set it off. And it wouldn't attack." "Too bad," said Bal. "We'll just have to forget there ever was such a planet as Earth." "I'm doing it," said Bal. "Just give them a little time and they won't be here to remind me that said Ethaniel. "I ask you to look at them." Bal rustled, flicking the screen intently. "Very much like ourselves," he said at last. "A bit seem defenseless, though I suppose they're not." "Tough," said Bal. "Nothing we can do about it." "There is. We can give them "You can't tell," said Ethaniel. "We can look things over." 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 hour." "What can I say?" said Bal. "I suppose we can stop and look them over. We're not committing Earth, not intending to commit themselves. For a day they circled not difficult, testing, and sampling. Finally Ethaniel looked up 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." "You must think something." "I wish I knew what to think. There's so little time," Ethaniel have it." "I realize that." "A flat yes or no," said Bal. "No. We can't help them," said Ethaniel. "There is nothing we can do for them—but we have to try." started," said Bal. "It's happened before. We take the trouble to find out what a people are like they met again. In the meantime the ship moved much closer to northern hemisphere was glistening white. Ragged clouds covered the pole, and a dirty pall spread over the mid-regions of the north. "I haven't thought of anything brilliant," said Ethaniel. "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 "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." "Well, you're calling it," said Bal. "All right," said Ethaniel. "You take one side and I the other. We'll tell them bluntly have time for." "Special instructions?" "None. We leave the ship here and go down in separate landing craft. You can talk with me any 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." "I'm afraid not. The great powers are in the north. They are the ones we have to reach to do the job." "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. "Fill me in on that holiday, anything I ought to know. Probably ago," said Ethaniel. "I didn't learn anything exact from radio and TV. Now it seems to be "You ought to know. You're running this one." Bal looked down at the planet. Clouds were beginning to form at the twilight "They can't touch it. No matter how they develop in the next hundred years they still won't be about. Down there, alone." "I'll be with you. On the other side of the Earth." "That's not very close. I'd like 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 "I don't guarantee anything," said Ethaniel. "This is what I was thinking of: instead of hiding the ship against the sun be seen, we'll make sure that they do see it. Let's take it around to the night side of the 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, ship in position, glowing against the darkness of space, pulsating with light, Bal said: "You know, I feel better about this. We 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 that he entered a small landing Earth. As soon as it was safe to do so, Bal left in another craft, heading for the other side of the planet. 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 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 as he came in. "I don't know how we did it and I thought we were going to fail but at the last minute they came through." Ethaniel smiled. "I'm tired," 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 Ethaniel. "If I went out walking one day I noticed that the next "It did. I don't know why, but it did," said Bal. "Anyway, this agreement they made isn't the from destroying themselves." "It's as much as we can expect," said Ethaniel. "They may have small wars after this, but "Why?" "Something like that happened to me," said Ethaniel. "I didn't get it but I didn't let it upset me," said Bal. "I smiled He shivered again. "It was always cold. I walked out, but sometimes I flew back. I hope that was all right." In the cabin Bal spread his great wings. Renaissance painters "I don't think it hurt us that you flew," said Ethaniel. "I did bound to resemble ours." "Sure," said Bal. "Anyway, peace on Earth." THE END

<question>:
Why are Bal and Ethaniel so cold?

<options>:
A People are mistaking them for the types of angles seen in Renaissance paintings. It is likely they are wearing little or no clothing.
B They are cold because the clothing synthesizer on their spaceship was not equipped with the materials needed to make cold-weather gear.
C They are cold because the planet they come from has a much warmer climate, and they were not prepared for cold weather.
D Bal and Ethaniel are cold because it is winter where they have landed on Earth.

<answer>:

D