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

<passage>:
they skipped several steps in the procedure. The chordata discerner read Positive on the body? Naturally they did not get results at once, nor did they expect to it required a fine adjustment. But they were disappointed that they found nothing for several hours as they hovered high over the rotation. Then it came—clearly and definitely, but from quite a small location only. "Limited," said Steiner, "as though within a pale. As though there were but one city, if that is its form. Shall we follow the rest of the surface to find another, or concentrate on this? It'll be twelve hours before it's back in our ken if we let it go now." "Let's lock on this one and finish the scan. Then we can do the rest of the world to make sure we've missed nothing," said Stark. There was one more test to run, one very tricky and difficult of designed simply to locate a source of superior thought. But this might be so varied or so unfamiliar that often both the machine and the told the machine so heatedly. The machine replied, with such warmth that its relays chattered, that Glaser did not , the machine insisted. It was for this reason that Glaser used that model no more, but built Positive on ninety per cent of the acknowledged superior minds of the Earth. In space it had been a action. Eppel was busy. The machine had a touch of the ham in it, and assumed an air of importance when it ran these tests. Finally it signaled the result, the most exasperating result it ever forewarned. "Scan the remainder of the world, Steiner," said Stark, "and the rest of us will get some sleep. If you find no other spot then we will go down on that one the next time it is in position under us, in about twelve hours." "You don't want to visit any of the other areas first? Somewhere away from the thoughtful creature?" "No. The rest of the world may be dangerous. There must be a reason that thought is in one spot only. If we find no others then we will go down boldly and visit this." So they all, except Steiner, went off to their bunks then: Stark, the Captain Gregory Gilbert, the executive officer from?" "I don't know, but they're right in the middle of it. Land here. We'll go to meet them at once. Timidity has never been an efficacious tool with us." Well, they were people. And one could only wish that all people were He may or may not have been understood, but the two of them smiled at him, so he went on. named hoolock." wouldn't have a drink on you for a tubful of thirsty travellers, would you?" "The fountain." "Ah—I see." But the crew all drank of the fountain to be sociable. It was water, but water that excelled, cool and with all its original bubbles like the first water ever made. human. I don't understand that light that surrounds them. And they seem to be clothed, as it were, in dignity." "And very little else," said Father Briton, "though that light trick does serve a purpose. But I'm not sure they'd pass in Philadelphia." "Talk to them again," said Stark. "You're the linguist." "That isn't necessary here, Captain. Talk to them yourself." "Are there any other people here?" Stark asked the man. "The two of us. Man and woman." The captain was a little puzzled by this, but he went on doggedly: "Ha-Adamah, what do you think that we are? Are we not people?" "And the damnest thing about it," muttered Langweilig, "is, how are you going to prove him wrong? But it does give you a small feeling." "Can we have something to eat?" asked the Captain. "Pick from the trees," said Ha-Adamah, "and then it may be that you will want to sleep on the grass. Being not of human nature (which does not need sleep or rest), it may be that you require respite. But you are free to enjoy the garden and its fruits." "We will," said Captain Stark. They wandered about the place, but they were uneasy. There were the animals. The lion and lioness were enough to make one cautious, though those rocks would bear examining." "Flecked with gold, and possibly with something else," said Stark. "A very promising site." proposition to maintain here as on Earth?" "All things are possible." And it was then that Ha-Adamah, the shining man, gave a wild cry: "No, "It is a little odd. Adam, old man, how long have you been here?" "Forever less six days is the answer that has been given to me. I never did understand the answer, however." "And have you gotten no older in all that time?" "I do not understand what 'older' is. I am as I have been from the "Yes, there is a question that will settle it. Adam, old man, how about "This is hardly the time for clowning," said Stark. "I'm not clowning, Captain. How about it, Adam? I'll give you choice of colors and first move." and have a go at it." "No. It would be no contest. I would not like to humble you." They were there for three days. They were delighted with the place. It was a world with everything, and it seemed to have only two inhabitants. They went everywhere except into the big cave. "What is there, Adam?" asked Captain Stark. "The great serpent lives there. I would not disturb him. He has long persevere, it will come by him." They learned no more of the real nature of the sphere in their time there. Yet all but one of them were convinced of the reality when they left. And they talked of it as they took off. "A crowd would laugh if told of it," said Stark, "but not many would laugh if they had actually seen the place, or them. I am not a gullible are garbed in light and innocence, and they have the happiness that we have been seeking for centuries. It would be a crime if anyone disturbed that happiness." of the serpent, and intrude and spoil." Down in the great cave that Old Serpent, a two-legged one among whose names were "Snake-Oil Sam," spoke to his underlings: "It'll take them fourteen days to get back with the settlers. We'll have time to overhaul the blasters. We haven't had any well-equipped settlers for six weeks. It used to be we'd hardly have time to strip and slaughter and stow before there was another batch to take care of." "I think you'd better write me some new lines," said Adam. "I feel like a goof saying those same ones to each bunch." "You are a goof, and therefore perfect for the part. I was in show business long enough to know never to change a line too soon. I did space-sealed wheeled, tracked, propped, vaned and jetted vehicles and power packs to run a world. He looked at the three dozen space ships stripped and stacked, and at "I know it, Eve. The lion is a very important prop. Maybe one of the crackpot settlers will bring a new lion." Casper Craig was still dictating the gram: "Amazing quality of longevity seemingly inherent in the locale. Climate ideal. Daylight or half-light. All twenty-one hours from Planet Delphina and from Sol. Pure water for all industrial purposes. Scenic and storied. Zoning and pre-settlement restrictions to insure congenial neighbors. A completely planned globular settlement in a near arm of our own galaxy. Low taxes and liberal credit. Financing our specialty—" "And you had better have an armed escort when you return," said Father Briton. "Why in cosmos would we want an armed escort?" "It's as phony as a seven-credit note!" "You, a man of the cloth doubt it? And us ready skeptics convinced by

<question>:
How does the "Old Serpent" know that the crew is returning with settlers?

<options>:
A He understands people, and that they'll want to have their way with the planet.
B Like Adam, he has extraordinary perception and can predict it happening.
C It has happened before. He knows that people cannot resist the temptation and takes advantage of it.
D The crew made it clear they would return.

<answer>:

C