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

<passage>:
Extensive research did not uncover any evidence that the U.S. copyright on this publication was renewed.] They were such cute synthetic creatures, it was impossible not to love them. Of course, and miserable. not even from Bermuda." " Intelligent "I thought they were all registered," Anne said. "They are. I told her she had the wrong neutroid, but she got mad. Went "A small child is an imbecile. Would you kill a small child?" "You're taking intelligence as the only criterion of humanity," he protested hopelessly, knowing that a logical defense was useless against sentimentality. "Baby—" If Delmont's falsification had been widespread, he might have to turn several of the thirty-five over to central lab for dissection and ultimate destruction. That would bring the murderous wrath of their owners down upon him. He began to understand why bio-inspectors were frequently shifted from one territory to another. things about the She sipped her coffee and appeared to be listening, so he went on. "And what can I do? You know how the Federation handles employment. They looked over my aptitude tests and sent me to Bio-Administration. If I don't want to follow my aptitudes, the only choice is common DUMB BLONDES AND GOLDFISH MUTANTS FOR THE CHILDLESS BUY A BUNDLE OF JOY because I liked babies. And because I have a B.S. in biology and an delicately cut from cold marble. She was a small woman, slender and never got farther than "mamma," "pappa," and "cookie." Anthropos was afraid to make the quasi-humans too intelligent, lest sentimentalists proclaim them really human. suburban street wound among the pastel plasticoid cottages that were set approximately two to an acre on the lightly wooded land. With its population legally fixed at three hundred million, most of the country had become one big suburb, dotted with community centers and lined of their own, could get quite attached to a cat-Q-5. The felines were emotionally safer than the quasi-human chimp-K series called "neutroids." When a pet neutroid died, a family was broken with grief but most couples could endure the death of a cat-Q or a dog-F. Class-C couples were allowed two lesser units or one neutroid. His grin faded as he wondered which Anne would choose. The Norrises were class-C—defective heredity. Subject: Deviant Neutroid. You will immediately begin a systematic and thorough survey of all birth dates during July 2234. This is in connection with the Delmont Negligency Case. Seize all animals in this category, impound, and run proper sections of normalcy tests. Watch for mental and glandular one animal is found. Be thorough. If allowed to reach age-set or adulthood, such a deviant could be the slightest abnormality in the normalcy tests. Forward to central lab. Return standard units to their owners. Accomplish entire survey getting absent-minded, because I forgot she was class C until I got there." He hesitated. "The baby turned out to be a neutroid. It's dying. Eighteenth order virus." "So?" "Well, she's—uh—rather a peculiar humans. Of course, no hospital would play along with her fantasy and take a neutroid, especially since she couldn't pay for its treatment." "I still don't see—" even though they look exactly alike, the new one won't recognize her. It'll be spooky." There was a long pause, followed by a sigh. "I'll try it anyway. Can I entered his territory, and they were about equally divided among five After lunch, he called each of the retail dealers, read them the serial numbers, and asked them to check the sales records for names and addresses of individual buyers. By three o'clock, he had the entire list filled out, and the task began to look easier. All that remained And that liking what he had to do. Anne came to stand beside him and examine the scratches. The robot operator, which had on tape the working habits of each Wylo "Honeymoon's on again, huh?" she whispered against his neck. "Come on," he grunted. "Let's unload some neutroids, before I forget all about work." They went out to the kennels together. The cages were inside a for the fragile neuter humanoid creatures, and another for the lesser mutants, such as cat-Qs, dog-Fs, dwarf bears, and foot-high lambs that as they leaped about their compartments with monkey grace. Their human appearance was broken by only two distinct features: short beaverlike tails decorated with fluffy curls of fur, and an erect thatch of scalp-hair that grew up into a bright candleflame. Otherwise, they appeared completely human, with baby-pink skin, quick little smiles, and cherubic faces. They were sexually neuter and never grew beyond a predetermined age-set which varied for each series. Age-sets were available from one to ten years human equivalent. Once a neutroid reached its age-set, it remained at the set's child-development level until death. "They must be getting to know you pretty well," Anne said, glancing around at the cages. " Apple cores! " He turned to face his wife. "How did apples get in there?" She reddened. "I felt sorry for them, eating that goo from the paused, wondering how he could tell her the truth. He blundered on: "They get to love whoever feeds them." "I can't see—" gene structure with sub-atomic particles. It's tricky business. He flashes a huge enlargement of the ovum on the electron microscope screen—large enough so he can see the individual protein molecules. He has an artificial gene pattern to compare it with. It's like shooting sub-atomic billiards. He's got to fire alpha-particles into the gene structure and displace certain links by just the right amount. And Anyway, he reported one success the next day. It was faked. The ovum had a couple of flaws—something wrong in the central nervous system's determinants, and in the glandular makeup. Not a standard neutroid ovum. He passed it on to the incubators to get a credit, knowing it wouldn't be caught until after birth." "So it would develop sexuality. A neutroid would be born a female if they didn't give it suppressive doses of male hormone prenatally. That keeps ovaries from developing and it comes out neuter. But inspection. They'd dispose of her without even bothering to examine for the other defects. And he could blame the sexuality on an equipment malfunction. He thought it was pretty smart. Trouble was they didn't catch the female. She went on through look female." "How did they find out about it now?" potential murderer. All She looked up and shook her head. "It belongs to somebody else. If it fixes a libido attachment on you, you're actually robbing its owner. They can't love many people at once." "I know what I'm saying. We're class-C on account of heart-trouble in to have a baby." "You know what they'd do to us?" "If they catch us, yes—compulsory divorce, sterilization. But they was obvious. Society manufactured them because killing them was permissible. Human babies could not be disposed of when the market became glutted. The neutroids offered solace to childless women, kept them satisfied with a restricted birth rate. And why a restricted birth rate? Because by keeping the population at five billions, the Federation could insure a decent living standard for everybody. he created nothing. He thought that he had created—with his medical science and his end to wars—a longer life for the individual. But he found that he had only taken the lives of the unborn and added them to the years of the aged. Man now had a life expectancy of eighty, except

<question>:
How are citizens organized into different classes in society?

<options>:
A Through random assignment at birth
B According to their socioeconomic status
C After a lengthy interview with Anthropos upon reaching a specific age-set
D By an analysis of their genes and heredity

<answer>:

D