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

<passage>:
mutants as children. He had been brought up in it. Emotion came in conflict with the grim necessities of his job. Somehow he would have to love them in the parlor and kill them in the kennel. It was only a matter of adjustment. cages. There had been two highly reluctant mothers, but he skipped them and left the seizure to the local authorities. Yates had already brought in the three from yesterday. cup and staring fixedly out the window at the kennels behind the house. and miserable. "Honeymoon's over, huh?" " Intelligent animals!" that were to be had without the threat of a warrant. The screams and pleas and tears of the owners left him gloomily despising himself. 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. "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 labor. That's the ." "I suppose you have an aptitude for killing babies?" she said sweetly. Norris withered. His voice went desperate. "They assigned me to it because I Somewhere a puppy was yapping, and a parrot croaked the lyrics of 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 were emotionally safer than the quasi-human chimp-K series called "neutroids." When a pet neutroid died, a family was broken with grief and such. Not to mention that sign—'dumb blondes.' They outlawed that one when they executed that shyster doctor for shooting K-108s full of growth hormones, trying to raise himself a harem to sell. Besides, were class-C—defective heredity. He found himself in Sherman III Community Center—eight blocks of you're required to keep sales records until they've been micro-filmed. birth dates during July 2234. This is in connection with the Delmont Negligency Case. Seize all animals in this category, impound, and run If allowed to reach age-set or adulthood, such a deviant could be dangerous to its owner or to others. Hold all seized K-99s who show the slightest abnormality in the normalcy tests. Forward to central three hundred animals a month. He tried to estimate how many of July's influx had been K-99s from Bermuda Factory. Forty, at least. Could he do it in a week? And there were only eleven empty neutroid cages in his kennel. The other forty-nine were occupied by the previous inspector's "unclaimed" inventory—awaiting destruction. "She insists it's going to a hospital. Worst part is that she's heard of the disease. Knows it can be cured with the proper treatment—in humans. Of course, no hospital would play along with her fantasy and "It's not funny. I've got to get those neutroids. It's in connection with the Delmont case." twelve. They're in the truck." "That's good," she said. "You've got only twelve empty cages." He neglected to tell her that he had stopped at twelve for just this "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 mutants, such as cat-Qs, dog-Fs, dwarf bears, and foot-high lambs that never matured into sheep. The third room contained a small gas chamber 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 until death. "They must be getting to know you pretty well," Anne said, glancing around at the cages. Norris was wearing a slight frown as he inspected the room. "They've He walked along a row of cages, then stopped by a K-76 to stare. " Apple cores! there?" She reddened. "I felt sorry for them, eating that goo from the mechanical feeder. I drove down to Sherman III and bought six dozen "They get to love whoever feeds them." "I can't see—" 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 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. the back of the kennel-truck. He grinned at his wife. "This little potential murderer. All these kiddos are from the machines in the section where Delmont worked." And it was designed to be as affectionate as a human child. "Put it in the cage, Anne," he said quietly. She looked up and shook her head. "It belongs to somebody else. If it fixes a libido attachment on you, what—" "I know what I'm saying. We're class-C on account of heart-trouble in both our families. Well, I don't care, Terry. I'm not going to waste a heart over one of these pathetic little artificial animals. We're going 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 hide it." brandishing a pistol and screaming, 'You stole my baby! You gave me the wrong baby! Where's my baby?' kennels. A half moon hung low in a misty sky, and the wind was chilly 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. He hurriedly quit the kennels and went to sit on the back steps. His eyes were burning, but the thought of tears made him sicker. It was that it would never be all right, neither the creating nor the killing, until he—and the whole world—completely lost sanity. And then kennel-truck, meaning to get the rest of the Bermuda-K-99s so that he 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. Where there was giving, Norris thought glumly, there was also taking

<question>:
The barn and kennels are allusions to:

<options>:
A Ethnic experimentation labs
B Torture chambers
C Unethical animal testing facilities
D Concentration camps

<answer>:

D