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

<passage>:
The oldster in the stained convalescent suit gave her a quick, shy smile other patients working at the long tables in the hospital's arts and crafts shop. Two muscular and bored attendants in spotless whites, lounged beside the locked door and chatted idly about the Dodgers' buildings of the hospital and the hills blocked the view of the austere complex of buildings that housed the main wards. "And what are we making today, Mr. Funston?" Miss Abercrombie asked. Without looking up from his bench he muttered a reply. "Atom bomb." thought you said an 'atom bomb.'" "Did," Funston murmured. Safely behind the patient's back, Miss Abercrombie smiled ever so slightly. "Why that's very good, Mr. Funston. That shows real creative At the clay table, Funston feverishly fabricated the last odd-shaped bit to the main administration building where her car was parked. As she drove out of the hospital grounds, Thaddeus Funston stood at the barred window of his locked ward and stared vacantly over the hills towards the craft shop. He stood there unmoving until a ward attendant came and took his arm an hour later to lead him off to the patients' mess hall. The sun set, darkness fell over the stilled hospital grounds and the ward lights winked out at nine o'clock, leaving just a single light burning in each ward office. A quiet wind sighed over the still-warm At 3:01 a.m., Thaddeus Funston stirred in his sleep and awakened. He sat up in bed and looked around the dark ward. The quiet breathing and occasional snores of thirty other sleeping patients filled the room. Funston turned to the window and stared out across the black hills that sheltered the deserted crafts building. He gave a quick cry, shut his eyes and clapped his hands over his face. shadows on the walls of the suddenly-illuminated ward. An instant later, the shattering roar and blast of the explosion struck the hospital buildings in a wave of force and the bursting crash of a thousand windows was lost in the fury of the explosion and the wild screams of the frightened and demented patients. small mushroom-shaped cloud, rose above the gaping hole that had been the arts and crafts building. Thaddeus Funston took his hands from his face and lay back in his bed with a small, secret smile on his lips. Attendants and nurses scurried through the hospital, seeing how many had been injured in the explosion. The roar and flash of the explosion had lighted and rocked the surrounding countryside. Soon firemen and civil defense disaster units from a half-dozen neighboring communities had gathered at the still-smoking hole that marked the site of the vanished crafts building. Within fifteen minutes, the disaster-trained crews had detected heavy radiation emanating from the crater and there was a scurry of men and equipment back to a safe distance, a few hundred yards away. Atomic Energy Commission experts, military intelligence men, four FBI agents and an Army full colonel disembarked. At 5:45 a.m. a cordon was thrown around both the hospital and the blast crater. In Ward 4-C, Thaddeus Funston slept peacefully and happily. "It's impossible and unbelievable," Colonel Thomas Thurgood said for the fifteenth time, later that morning, as he looked around the group of experts gathered in the tent erected on the hill overlooking the crater. "How can an atom bomb go off in a nut house?" "It apparently was a very small bomb, colonel," one of the haggard AEC men offered timidly. "Not over three kilotons." "I don't care if it was the size of a peanut," Thurgood screamed. "How did it get here?" A military intelligence agent spoke up. "If we knew, sir, we wouldn't be standing around here. We don't know, but the fact remains that it WAS an atomic explosion." Thurgood turned wearily to the small, white-haired man at his side. that was in that building?" Thurgood swept his hand in the general direction of the blast crater. "Colonel, I've told you a dozen times," the hospital administrator said that led them to this hospital. They worked with oil and water paints and clay. If you can make an atomic bomb from vermillion pigments, then Madame Curie was a misguided scrubwoman." Thurgood sighed. "I also know that an atomic explosion at 3:02 this morning blew it to hell and gone. "And I've got to find out how it happened." Thurgood slumped into a field chair and gazed tiredly up at the little "We've already called for Miss Abercrombie and she's on her way here now," the doctor snapped. Outside the tent, a small army of military men and AEC technicians moved around the perimeter of the crater, scintillators in hand, examining every tiny scrap that might have been a part of the building at one expression. "He did make an atom bomb," she cried. Colonel Thurgood, who had snapped from his chair at her words, leaped forward to catch her as she collapsed in a faint. At 4:00 p.m., the argument was still raging in the long, narrow staff room of the hospital administration building. Colonel Thurgood, looking more like a patient every minute, sat on the "It's ridiculous," Thurgood roared. "We'll all be the laughingstocks of Funston's work?" another chance to repeat his bomb. But this time under our supervision." Thurgood leaped to his feet, his face purpling. "Are you crazy?" he screamed. "You want to get us all thrown into this the IQ of an ape could make an atomic bomb out of kid's modeling clay? "They'd crucify us, that's what they'd do!" At 8:30 that night, Thaddeus Funston, swathed in an Army officer's greatcoat that concealed the strait jacket binding him and with an Two military policemen and a brace of staff psychiatrists sworn to hospital," she replied, "and it's the same amount." Thurgood signaled to the doctors and they entered the shack with Thaddeus Funston between them. The colonel nudged Miss Abercrombie. She smiled at Funston. "Now isn't this nice, Mr. Funston," she said. "These nice men have A flicker of interest lightened Thaddeus' face. He looked around the Miss Abercrombie stood at his shoulder as Thaddeus hunched over the glanced at her watch. The maze of clay strips grew and as Funston from the shack. There was a moment of hushed silence and then pandemonium burst. The and photographed it from every angle. Then they left for the concrete observatory bunker, several miles down range where Thaddeus and the psychiatrists waited inside a ring of stony-faced military policemen. "I told you this whole thing was asinine," Thurgood snarled as the scientific teams trooped into the bunker. Thaddeus Funston stared out over the heads of the MPs through the open A brilliance a hundred times brighter than the glaring Nevada sun lit the dim interior of the bunker and the pneumatically-operated door slammed shut just before the wave of the blast hit the structure. Six hours and a jet plane trip later, Thaddeus, once again in his strait jacket, sat between his armed escorts in a small room in the Pentagon. across a half-opened transom into the room where Thaddeus Funston sat in In the next room, Thaddeus Funston stared out over the sweeping panorama

<question>:
Why does Thaddeus Funston smile at the sight of the demolished arts and crafts building?

<options>:
A His prophecy of an alien invasion was fulfilled
B He is gleeful at the idea of part of the mental hospital being destroyed
C His self-constructed clay atom bomb was effectively detonated
D He knows the explosion will distract the hospital staff and give him an opportunity to escape

<answer>:

C