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

<passage>:
things got tough, but could still satisfy a woman's craving to mother matter of adjustment. At noon, he brought back another dozen K-99s and installed them in his cages. There had been two highly reluctant mothers, but he skipped "They are. I told her she had the wrong neutroid, but she got mad. Went started a black market in neutroids?" "Don't call me baby! Call several of the thirty-five over to central lab for dissection and ultimate destruction. That would bring the murderous wrath of their I make my DUMB BLONDES AND GOLDFISH MUTANTS FOR THE CHILDLESS BUY A BUNDLE OF JOY babies. And because I have a B.S. in biology and an aptitude for dealing with people. Can't you understand? Destroying unclaimed units is the smallest part of it. Honey, before the evolvotron, before Anthropos went into the mutant-animal business, people used to elect dogcatchers. Think of it that way—I'm just a than the neutroids. A K-108 could speak a dozen words, and a K-99 never got farther than "mamma," "pappa," and "cookie." Anthropos was afraid to make the quasi-humans too intelligent, lest sentimentalists started toward a bank of neutroid cages along the opposite wall, but 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. of growth hormones, trying to raise himself a harem to sell. Besides, you're required to keep sales records until they've been micro-filmed. Subject: Deviant Neutroid. Unauthorized neutroids could mean lots of trouble. lab. Return standard units to their owners. Accomplish entire survey project within seven days. hundred square miles. Its replacement-quota of new neutroids was around do it in a week? And there were only eleven empty neutroid cages in his for finding and testing forty neutroids would put him in a tight Glubbes—called a while ago and said her baby was sick. I must be 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?" Can't you send the neutroid to a vet?" take a neutroid, especially since she couldn't pay for its treatment." one of them with assault. I tried to pick up their neutroids for a "It's not funny. I've got to get those neutroids. It's in connection they just won't listen to reason. But get those neutroids." "Okay, boy. Gotcha." "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 sprawling concrete barn, which was divided into three large rooms—one for the fragile neuter humanoid creatures, and another for the lesser with a conveyor belt leading from it to a crematory-incinerator. Norris kept the third locked lest his wife see its furnishings. The doll-like neutroids began their mindless chatter as soon as their keepers entered the building. Dozens of blazing blond heads began dancing about their cages. Their bodies thwacked against the wire mesh 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. " Apple cores! " He turned to face his wife. "How did apples get in there?" plant. His job was taking the unfertilized chimpanzee ova out of the egg-multiplier, mounting them in his machine, and bombarding the 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 he's got to be quick about it before the ovum dies from an overdose of single success. They threatened to fire him. I guess he got hysterical. 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." "It wasn't caught at all?" Anne asked. it, thought maybe a mental-deviant would pass, and that it might be dangerous. So he went back to its incubator and cut off the hormone flow into its compartment." "Why that?" 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 Delmont figured a female would be caught and stopped before the final inspection. They'd dispose of her without even bothering to examine for malfunction. He thought it was pretty smart. Trouble was they didn't catch the female. She went on through potential murderer. All these kiddos are from the machines in the to have a baby." "You know what they'd do to us?" "If they catch us, yes—compulsory divorce, sterilization. But they won't catch us. I'll have it at home, Terry. Not even a doctor. We'll Glubbes, the alleged intruder, has no baby "Neutroid trouble." kennels. A half moon hung low in a misty sky, and the wind was chilly out of the north. He went into the neutroid room and flicked a switch. A few sleepy chatters greeted the light. One at a time, he awoke twenty-three of the older doll-things and carried them to a large glass-walled compartment. These were the long-time residents willingly—like children after the Piper of Hamlin. When he had gotten them in the glass chamber, he sealed the door and turned on the gas. The conveyor would automatically carry them on to the incinerator. Now he had enough cages for the Bermuda-K-99s. kennel-truck, meaning to get the rest of the Bermuda-K-99s so that he could begin his testing. 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 that he had damn little chance of being born to enjoy it. A neutroid filled the cradle in his stead. A neutroid that never ate as much, or grew up to be unemployed. A neutroid could be killed if

<question>:
How do they create neutroids?

<options>:
A They modify the glandular makeup of chimpanzee ova using hormones.
B They incubate chimpanzee ova, giving them testosterone to keep the animals from developing ovaries.
C They bombard the unfertilized eggs with radiation.
D They change the structure of unfertilized egg genes using sub-atomic particles.

<answer>:

D