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.] Harper Breen sank down gingerly into the new Relaxo-Lounge. He placed twitching hands on the arm-rests and laid his head back stiffly. He closed his fluttering eyelids and clamped his mouth to keep the corner "Just lie back, Harp," droned his sister soothingly. "Just give in and let go of everything." Harper tried to let go of everything. He gave in to the chair. And gently the chair went to work. It rocked rhythmically, it vibrated tenderly. With velvety cushions it massaged his back and arms and legs. For all of five minutes Harper stood it. Then with a frenzied lunge he escaped the embrace of the Relaxo-Lounge and fled to a gloriously stationary sofa. crack up. Don't blame him for your own stubbornness." Harper snorted. His large nose developed the sound magnificently. people are flocking to it to get cured of whatever ails 'em? Old man, you missed a bet!" Leaping from the sofa, Harper rudely snatched the magazine from Scribney's hands. He glared at the spread which depicted a star-shaped structure of bottle-green glass resting jewel-like on the rufous rock Harper was enthralled. He'd staff his offices with them. Hang the expense! There'd be no more of that obnoxious personal friction and proneness to error that was always deviling the most carefully trained desk clerk who, poor man, was a high strung fellow human instead of a robot. Harper watched him shrinking and turning pale lavender in the stress of the argument. Harper snorted. "Wants someone she can devil," he diagnosed. "Someone she can get a kick out of ordering around." With vast contempt he stepped to the desk beside her and peremptorily rapped for the clerk. "One moment, sir," begged that harassed individual. "Just one moment, please." He turned back to the woman. But she had turned her glare on Harper. "You could at least be civil enough to wait your turn!" Harper smirked. "My good woman, I'm not a robot. Robots, of course, are always civil. But you should know by now that civility isn't a normal human trait." Leaving her temporarily quashed, he beckoned The clerk sputtered. Mrs. Jacobsen sputtered. But not for nothing was Harper one of the leading business executives of the earth. Harper's implacable stare won his point. Wiping beads of moisture from his forehead, the clerk fumbled for a card, typed it out, and was about to deposit it in the punch box when a fist hit the desk a resounding blow and another voice, male, roared out at Harper's elbow. "This is a helluva joint!" roared the voice. "Man could rot away to the knees while he's waitin' for accommodations. Service!" Again his fist banged the counter. The clerk jumped. He dropped Harper's card and had to stoop for it. Absently holding it, he straightened up to face Mrs. Jacobsen and the irate newcomer. Hastily he pushed a tagged key at Harper. "Here you are, Mr. Breen. I'm sure you'll find it comfortable." With a pallid smile he pressed a button and consigned Harper to the care of a silent and efficient robot. The room was more than comfortable. It was beautiful. Its bank of clear bell, and he wasn't the man to forget it. With a wonderful sense of well-being he returned to his room and prepared to relax. Harper opened his eyes. Two robots were bending over him. He saw that into his arm, bundled him onto the stretcher and started wheeling him out. Harper's tongue finally functioned. "What's all this?" he demanded. "There's nothing wrong with me. Let me go!" He struggled to rise, but a metal hand pushed him firmly on the chest. at that. There was a tentative knock on the door. "Come in," called Harper bleakly. As soon as the door opened he regretted his invitation, for the opening framed the large untidy man who had noisily pounded on the The robots ignored him. For the first time in his spectacular and ruthless career Harper was up against creatures that he could neither bribe, persuade nor browbeat, inveigle nor ignore. It shattered his ebbing self-confidence. He began waving his hands helplessly. The robots not only ignored Harper. They paid no attention at all to Jake Ellis, who was plucking at their metallic arms pleading, "Take but as usual a robot voice answered sweetly, mechanically, and meaninglessly. He hung up and went miserably to bed. There was something nagging at Harper's mind. Something he should do. Harper had guessed right. Gleefully from the doorway of his new room he watched the robots wheel away his equally delighted neighbor for up on a skinny neck from a collar three sizes too big. And he was shoeless. He was completely unable to navigate in Jake's number twelves. But Harper was a determined man. He didn't even flinch from his image in the mirror. Firmly he stepped over to Jake's telephone. Frantically he pushed the button that would summon the robot guard. With a gasp of relief he saw the two massive manlike machines moving inexorably forward. He pointed to Harper. "Get that patient!" he collar of his flapping coat. "Now—the manager, please." "This—this way, sir." With shrinking steps the clerk led Harper across the width of the lobby among the fascinated guests. He was beyond speech. Opening the inconspicuous door, he waved Harper inside and returned doggedly to his desk, where he began to pick up things and at the same time phrase his resignation in his mind. Brushing aside the startled secretary in the outer cubicle, Harper flapped and shuffled straight into the inner sanctum. The manager, who was busy chewing a cigar to shreds behind his fortress of gun metal desk, jerked hastily upright and glared at the intruder. "My good man—" he began. "Don't 'my-good-man' me!" snapped Harper. He glared back at the manager. Reaching as far across the expanse of desktop as he could stretch, he shook his puny fist. "Do you know who I am? I'm Harper Listening, an amazing calm settled on Harper. Thoughtfully now he hooked a chair to the desk with his stockinged foot, sat down and reached for the cigar that Hayes automatically offered him. "Oh, I back you to the hilt! I'll notify the owners at once. At once, Mr. Breen! And while we wait for them, allow me to put you up as a guest of the hotel." Coming around to Harper, he effusively shook Harp's scrawny hand, and then personally escorted him not merely to the door but across the lobby to the elevator. Harper gazed out at the stunned audience. This was more like the treatment he was accustomed to! Haughtily he squared his bony shoulders "There he is!" cried Bella. "Why, doesn't he look wonderful! Scrib, it's amazing! Look at him! And indeed, Harper was stepping briskly downward, looking spry and fit and years younger. He came across to them actually beaming. It was the first pleasant expression they had seen on his face in years.

<question>:
How did Harper thank Scribney for having "rung the bell"?

<options>:
A He felt he owed him and promised to reward him in the future.
B He hired him to work as superintendent of a factory at Hagerty's Enzymes.
C He gave him a large stock in Hagerty's Enzymes.
D He squeezed his arm and smiled at him - a rarity for a man like Harper.

<answer>:

C