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

<passage>:
rewarded with the key to these fourth dimensional broadcasts. A man who could devote his life to improving this lonely worldlet is obviously a Angus Johnson knew differently. He charged them person with unusual patience." Johnson asked skeptically: "How about a sample first?" Extensive research did not uncover any evidence that the U.S. copyright on this publication was renewed.] Characteristically, Harvey Ellsworth tried to maintain his dignity, though his parched tongue was almost hanging out. But Joe Mallon, with Joe reeled aside, and Harvey saw what had upset his partner. He stared, speechless for once. In their hectic voyages from planet to planet, the pair of panacea purveyors had encountered the usual strange life-forms. But never had impossible being to fill the partly-emptied bottles, squeeze fruit juice and sweep the floor, all of which the native did simultaneously. , the formula for which was recently discovered by ourselves in the ancient ruined city of La-anago. Medical science is unanimous in proclaiming this magic medicine the sole panacea in the entire history of therapeutics." Harvey nudged him warningly. "Easy, my boy, easy." He turned to the bartender apologetically. "Don't mind my friend. His adrenal glands are unconscionable interjection of a middleman between Nature and man's thirst." "Nope. That's my son, Jed. Angus Johnson's my name. Folks here just proper amount. Then Johnson rubbed his thumb on his index finger and Johnson's response almost floored them. "Who said anything about picked up buckets that hung on the tank. "Johnson, as I saw instantly, is the victim of a difficult environment, and must charge accordingly." "Just the same," Joe griped, "paying for water isn't something you can get used to in ten minutes." In the fragile forest, they soon came across a stream that sprang from "What's this doing here?" Harvey asked, puzzled. "I thought Johnson had stopped and their fists unclenched. "Thought you gents were leaving," the mayor called out, seeing them frozen in the doorway. "Glad you didn't. Now you can meet my son, Jed. Him and me are the whole Earthman population of Johnson City." "You don't need any more," said Harvey, dismayed. Johnson's eight-foot son, topped by a massive roof of sun-bleached hair and held up by a foundation that seemed immovable, had obviously been born and raised in low gravity. For any decent-sized world would have kept him down near the general dimensions of a man. his fingers were released in five units instead of a single compressed gently crossing. He sagged against the door frame, all his features drooping like a bloodhound's. "Bring him in here!" Johnson cried. "I mean, get him away! He's coming ?" demanded Johnson. "I come down with it every year, and I ain't hankering to have it in an off-season. Get him out of here!" "In good time. He can't be moved immediately." "Then he'll be here for months!" Harvey helped Joe to the counter and lifted him up on it. The mayor and his gigantic offspring were cowering across the room, trying to breathe in tiny, uncontaminating gasps. "You'll find everything you want in the back room," Johnson said Astonished, Johnson and his son drew closer. They searched Joe's face, case," said Johnson. "That would be the smallest investment you could make, compared with Johnson did not actually stagger back, but he gave the impression of Johnson stabbed out a warning finger. "No tricks now. I want a taste of Harvey looked reprovingly at his gangling partner. "Did Johnson ask to the same with six arms? He looks like a valuable. Can't we grab him off?" At first I purpose to exhibit him on our interplanetary tours with our streamlined panacea He seated them at a table, which a rope tied between posts made more or less private, though nobody else was in the saloon and there was little chance of company. Genius, the six-armed native, appeared from the dingy kitchen with phenomenally low. When they glanced up at Johnson in perplexity, he , using his other two whispered excitedly when Johnson and the native were both in the kitchen, attending to the next course. "He would make any society complained Harvey. "I wish Johnson would stay either swindler or honest "It's been a great honor, gents," he said. "Ain't often I have visitors, and I like the best, like you two gents." Johnson didn't answer. Neither did Genius Johnson sighed ponderously. "I was afraid you'd act like that," he said remain calm. "My friend," he said to the mayor, and his tones took on a schoolmasterish severity, "your long absence from Earth has perhaps made you forget those elements of human wisdom that have entered the folk-lore of your native planet. Such as, for example: 'It is folly "I don't get the connection," objected Johnson. "That's right," Johnson came back emphatically. "But what would your "Which one? The one we were going to make, or the one we can make now?" "Oh, come now, Mr. Johnson. Don't tell me no amount of money would stood up and admired the astonishing possession he had so inexpensively acquired. "I really hate to deprive you of this unique creature," he said to Johnson. "I should imagine you will be rather lonely, with only your filial mammoth to keep you company." "I sure will," Johnson confessed glumly. "I got pretty attached to Genius, and I'm going to miss him something awful." Harvey forcibly removed his eyes from the native, who was clearing off the table almost all at once. "My friend," he said, "we take your only solace, it is true, but in his place we can offer something no less amazing and instructive." worst and expects nothing better. "Joseph, get our most prized belonging from the communications room of "We must not be selfish, my boy," Harvey said nobly. "We have had our chance On a larger and heavier world than Planetoid 42, Johnson's curiosity would probably have had weight and mass. He was bursting with questions, but he was obviously afraid they would cost him money. For his part, Harvey allowed that curiosity to grow like a Venusian amoeba "Is that what you were talking about?" the mayor snorted. "What makes and I shall refuse you the greatest opportunity any man has ever had, with the sole exceptions of Joseph, myself and the unfortunate inventor of this absolutely awe-inspiring device." "I ain't in the market for a radio," Johnson said stubbornly. He has spurned our generosity. We have now the chance to continue our sorrowful, Harvey fondly stroked the scarred plasticoid cabinet. "To make a long story, Mr. Johnson," he said, "Joseph and I were among the chosen few who knew the famous Doctor Dean intimately. Just before his tragic death, you will recall, Dean allegedly went insane." He his greatest invention—this fourth dimensional radio!" "This what?" Johnson blurted out. "In simple terms," clarified Harvey, "the ingenious doctor discovered find himself in possession of a powerful, undreamt-of science!" "And this thing gets broadcasts from the fourth dimension?" "It does, Mr. Johnson! Only charlatans like those who envied Doctor Dean's magnificent accomplishments could deny that fact." Johnson recoiled. "No—no, hyper-scientific trimmings?" "Why, I don't know," Johnson said in confusion. "For three years, Joseph and I lost sleep and hair, trying to detect the simple key that would translate the somewhat metamorphosed broadcasts into our primitive English. It eluded us. Even the doctor failed. But that was understandable a sensitive soul like his could stand only so much. And the combination of ridicule and failure to solve the mystery caused him to take his own life."

<question>:
What makes Johnson's son so different?

<options>:
A He grew up without Earth's gravity, allowing him to grow larger than most people.
B He is much larger than the average man.
C Like Genius, he is not human.
D He's been living isolated from other humans with his father.

<answer>:

A