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

<passage>:
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. and grammars and began translating the major languages. The history of the planet was it was not much out of the way to swing nearer Earth. For days the two within the ship listened and watched with little comment. They had to decide soon. "We've got to make or break," said the first alien. "You know what I'm in favor of," said the second. "I can guess," said Ethaniel, 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." "The more reason for stopping," said Ethaniel. "The big bomb can destroy them. Without our help they may do just that." "I may remind you that in two "Without looking at the charts I can tell you we still have more than a hundred light-years to go." "A week," said Ethaniel. "We 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?" said Ethaniel. "I ask you intently. "Very much like ourselves," 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 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." "You can't tell," said Ethaniel. "We can look things over." "And then what? How much authority do we have?" "Very little," conceded Ethaniel. 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. Finally Ethaniel looked up "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 bomb without aircraft." "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 were investigating their weapons." "You must think something." "I wish I knew what to think. There's so little time," Ethaniel said. "Language isn't the difficulty. Our machines translate "No. We can't help them," said Ethaniel. "There is nothing we can do for them—but we have to try." find out what a people are like and when we can't help them we the ship moved much closer to Earth. They no longer needed instruments to see it. The planet revolved outside the visionports. brilliant," said Ethaniel. "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 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." "All right," said Ethaniel. 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 "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 did they wouldn't know what to them to think that we don't "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." there." "I'm afraid not. The great powers are in the north. They are the ones we have to reach to We'll be running straight into it. That won't help us any." "I know, they don't like their ago," said Ethaniel. "I didn't beginning to form at the twilight 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." "It's myself I'm thinking "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 "If it saves my neck I'm for "I don't guarantee anything," said Ethaniel. "This is what I was thinking of: instead of hiding the ship against the sun where there's little chance it will be seen, we'll make sure that "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." "Don't spare power." "Don't worry about that. 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. 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 Earth to illuminate it. Never, or 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 Ethaniel smiled. "I'm tired," Ethaniel. "If I went out walking from destroying themselves." "It's as much as we can expect," said Ethaniel. "They may have small wars after this, but "Why?" to me," said Ethaniel. "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." Amazing Science Fiction Stories January 1960. Extensive research did not uncover any evidence that the U.S.

<question>:
Why does Ethaniel think the humans look defenseless?

<options>:
A Without space travel, the humans seem defenseless against an alien attack.
B Without wings, the humans look small and defenseless.
C Without wings, the humans look like children.
D Without space weapon technology, the humans seem defenseless against an alien attack.

<answer>:

B