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

<passage>:
"Well, it's still a favor." a crime, get caught and be a hero ... an were laughing, squealing with joy as they played games designed by CPA psychologists to relieve tension. And—despite the treatment, Joe shuddered when he saw the psychologists standing to one side, quietly watching the children. The whole world was filled with CPA employees and volunteer workers. Everywhere you went, it was there, quietly watching you and analyzing you, and if you showed criminal tendencies, it watched you even more closely and analyzed you even more deeply because employers know they're good workers. "No. It's simple. If I get drunk, I can join the AAA and get free room It was easy enough to understand, he reflected, but a lot harder to do. The CPA robot bartenders saw to it that anyone got high if they wanted, the CPA, the whole world. But the words stayed in his throat, the pain pieces. He'd done that once and gone through a mountain of red tape to get another—everyone was required by law to carry a CPA ID card and show it upon request. "And who'll hire a guy with criminal tendencies? You know the score. When you try to get a job, they ask to see your ID before they even tell you if there's an opening or not. If your CPA ID says you're a Unlawful to divulge CPA procedure . "See what I mean?" Hendricks asked. "A century ago, you would have been locked in a prison and taxpayers' money would have supported you until the day you died. With the CPA system, you're returned to society, a useful citizen, unable to commit the smallest crime. And you've got a big hand in your dirty little mind that's going to slap it every time the voice, want to hire you for. I want you to help me commit a crime. If I get you is free to do what he wants, as long as it's legal." something big to plan a crime. A civilization weary of murder, robbery, kidnapping, counterfeiting, blackmail, rape, arson, and drunkenness had originated the CPA—Crime Prevention Association. There were no longer any prisons—CPA officials had declared loudly and emphatically that their job was to prevent crime, not punish it. And prevent it they did, with thousands of with pain and he felt suffocated. The CPA was everywhere, only now it "I think it's a lousy, filthy system." Joe's head was still tingling wasn't punished at all. Instead, he was sent to a hospital where all criminal tendencies were removed from his mind by psychologists, shock treatments, encephalographic devices, a form of prefrontal lobotomy and a dozen other methods. An expensive operation, but since there were few criminals—only ten in New York during the past year—any city could afford the CPA hospitals. The CPA system was, actually, cheaper than previous methods because it did away with the damage caused by countless crimes did away with to kill someone, beat their mates, get drunk, or kick a dog. Not only a hero, but because of the CPA Treatment, he was—when he left one of the CPA hospitals—a thoroughly honest and hard-working individual ... a man who could be trusted with any responsibility, any amount of money. And therefore, an EX (a convicted criminal who received the treatment because it theoretically inflicted psychological injury upon the intended victim—and because millions of women voters had voted it a crime. On the other hand, attempted murder, robbery, kidnapping, etc., were not crimes. They weren't crimes because the DCT didn't complete the act, and if he didn't complete the act, that meant simply that the CPA had once again functioned properly. The girl shook her head vigorously. "Sorry, buddy. Can't help you that way. Why didn't you tell me what you wanted?" the CPA. The WSDA gave free instruction in judo and jujitsu, even had collapsed beneath him. Conspiracy to commit a crime wasn't a crime. Anyone could conspire. And if the conspirators were prevented from committing a crime, then that meant the CPA had functioned properly once again. That meant the CPA had once again prevented crime, and the CPA didn't punish crimes or attempted crimes, and it didn't attempt to prevent crimes by punishment. If it did, that would be a violation prevent you from committing a crime, they'd get a nice reward and they'd be famous." "And the kids are the worst," Hendricks continued. "They have Junior CPA clubs. They keep records of hoodlums like you in little cardboard boxes. They'll stare at you on the street and stare at you through restaurant windows while you're eating meals. They'll follow you in your CPA system, a DCT can't get a decent job." have to be a DCT. With the free treatment, psychologists can remove all your criminal tendencies and—" Joe laughed. "If your damned CPA is so all-powerful, why can't you aren't protected properly—blind spots in our protection devices. As soon as we find them, we take steps to install anti-robbery devices, of the dark itself, but the darkened city always made him feel ill at ease. The uneasiness was, more than anything else, caused by his own imagination. He hated the CPA and at night he couldn't shrug the feeling that the CPA lurked in every shadow, watching him, waiting for him to make a mistake. Imagination or not, the CPA was almost everywhere a person went. Twenty-four hours a day, millions of microphones hidden in taverns, alleys, restaurants, subways and every other place imaginable waited for someone to say the wrong thing. Everything the microphones picked up was routed to the CPA Brain, a monster electronic calculator. If the words "Let's see a movie" were received in the Brain, they of it would kill a human. The FBI had always been a powerful organization, but under the supervision of the CPA, it was a scientific colossus and to think of kidnapping someone or to contemplate the use of narcotics was pointless. A counterfeiter's career was always short-lived: every place that could spot a fake and report it directly to the Brain. And the percentage of crimes had dwindled even more with the appearance low prices, no endeavor that required power was fantastic. The power required to operate the CPA devices cost each taxpayer an average of four dollars a year, and the invention, development and manufacture of the devices had cost even less. And the CPA had attacked crime through society itself, striking at the individual. In every city there were neon signs that blinked subliminally with the statement, CRIME IS FILTH. Listening to a radio law, it would have been wired with CPA burglarproof devices, but evidently he didn't want to pay for installation. . His trial would be a clean-cut one: it would be easy for the CPA to prove ownership and that a crime had been committed. Thief! Police! those people are down there because they admire what you did? They're down there waiting for you because they're curious, because they're glad the CPA caught you, and because they're glad you're an Ex. You're an ex than stealing a watch, he would be even more of a hero and the crowd would have cheered even louder. He knew: he had stood outside the CPA employee and he doesn't live in the apartment you robbed. The CPA pays the rent for that one and he lives in another. We have a lot of places like that. You see, it gives us a way to get rid of saps like you before they do real damage. We use it as a last resort when a DCT First Class won't take the free psycho treatment or—"

<question>:
How does the CPA prevent crime?

<options>:
A The CPA prevents crime with brain implants that suppress the criminal nature.
B The CPA prevents crime with large police forces, squad cars, and weapons.
C The CPA prevents crime through the use of psychological warfare.
D The CPA prevents crime using constant surveillance, subliminal messaging, public shaming, and various psychological treatments, including lobotomy.

<answer>:

D