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

<passage>:
"Sorry, darling," said Erica. She yawned, added, "I've tried—but I just can't believe you're my husband." He felt his own yawn slip off his face. "What do you mean? What am I sat up. "They said you were Dan Merrol at the hospital, but they must Look at me. Can't you tell who I am?" She returned his gaze, then swayed toward him. He decided that she was highly attractive—but surely he ought to have known that long ago. "They told you that too." She was wrong again, but it was probably wiser not to tell her how he knew. No one had said anything to him in the hospital. He hadn't given them a chance. He had awakened in a room and hadn't wanted to be alone. He'd got up and read the chart and searched dizzily through the closet. Clothes were hanging there and he'd put them on and muttered her name to himself. He'd sat down to gain strength and after a while he'd walked out and no one had stopped him. It was night when he left the hospital and the next thing he remembered was her face as he looked through the door. Her name hadn't been on the chart nor her address and yet he had found her. That proved something, didn't it? "How could I forget you?" he demanded. Maybe he should have stayed in the hospital. It would have been easier to convince her there. But he'd been frantic to get home. "It was quite He thought—and couldn't. He wasn't doing so well. "Another lapse," he said gloomily and then brightened. "But I can tell you lots about that arm was unexpectedly different. He hobbled over to a chair and sat down, staring miserably at Erica as she began dressing. There was quite a contrast between the loveliness of her body and the circus comedy of his own. comforted. "I waited till I was sure. I didn't want to upset you." He wasn't as sure as she seemed to be now. Somehow, maybe he was still Dan Merrol—but he wasn't going to insist on it—not after looking at himself. Not after trying to sort out those damned memories. She was too kind, pretending to be a little attracted to him, to the He looked critically at himself in the mirror. Dressed, his total effect was better than he had dared hope it would be. True, he did look different He must have given some explanation as he'd stumbled through the door. What was it? "When I brought the clothes yesterday, they told me I couldn't see you for a day or so," she mused aloud. "It was the first time you'd been face." It was the clothes, plus the brief glimpse of his face, which had made her think she recognized him when he came in. "They told me you'd have to have psychotherapy and I'd have to have He'd been unnecessarily rough, but that could be ascribed to lack of coordination. She could have been terrified, might have resisted—but she hadn't. At that time, she must have half-believed he was Dan Merrol, still dangerously near the edges of post-regrowth shock. She was looking at him, waiting for that explanation. He shook his "That's new, isn't it?" she said. "I always thought they watched the patient carefully." when I wanted to come home, they let me. It's their latest belief that initiative is more important than perfect health." "Strange," she muttered. "But you are very strong." She looked at him and blushed. "Initiative, certainly you have. Dan could use some, wherever he is." Dan again, whether it was himself or another person. For a brief time, as she listened to him, he'd had the silly idea that.... But it could never happen to him. He'd better leave now while she was distracted and bewildered and believed what he was saying. "I've got to go. I'm due back," he told her. "Not before you eat," she said. "Any man who's spent the night with me is hungry in the morning." It was a domestic miracle that amidst all the pressing and fitting, she'd somehow prepared breakfast and he hadn't noticed. It was a simple chore with the automatics, but to him it seemed a proof of her wifely skill. predecessor. It tingled at her touch. Sadly, he sat down and looked at his food. Eat? Did he want to eat? Oddly enough, he did. it was out in the open, he did remember some facts about spaceships. He felt he could manage a takeoff at this instant. But why hadn't he told her? Shock? Perhaps—but where had those other Later, he might tell her, if there was to be a 'later.' He pushed back his chair and looked at her uncertainly. matched his legs, they'd given him good ones. Last night, on an impulse, he'd left the hospital and now he had to go back. Had The receptionist was busy with the drawer of the desk. "Can I help she murmured. "Please don't think that I consider you at all funny." The hell she didn't—and it was the second time within the hour a woman had used that word on him. He wished they'd stop. He took back his "When can I see the director?" She blinked at him. "A patient?" She didn't need to look twice to see that he had been one. "The director does occasionally see ex-patients." He watched her appreciatively as she went inside. The way she walked, you'd think she had a special audience. Presently the door opened and she came back, batting her eyes vigorously. "You can go in now," she said huskily. Strange, her voice had dropped in the middle of a grave emergency." On his way in, he miscalculated, or she did, and he brushed against her. The touch was pleasant, but not thrilling. That reaction seemed reserved for Erica. "Glad to see you," said Doctor Crander, behind the desk. He was nervous and harassed for so early in the morning. "The receptionist didn't give me your name. For some reason she seems upset." She did at that, he thought—probably bewildered by his appearance. The hospital didn't seem to have a calming influence on either her or the doctor. "That's why I came here. I'm not sure who I am. I thought I was Dan Merrol." himself by wiping his forehead. "Our missing patient," he said, sighing with vast relief. "For a while I had visions of...." He then decided that visions were nothing a medical man should place much faith in. The doctor came cautiously around the desk this time. "Of course. I didn't expect that you'd come walking in my office—that's why I didn't recognize you immediately." He exhaled peevishly. "Where did you go? We've been searching for you everywhere." his bewildered patient. Miss Jerrems flashed a glance of open adoration at the doctor and before she could reel it in, her gaze swept past Dan, hesitated and returned to him. Her mouth opened and closed like that of a nervous goldfish and she darted from the room. They see me and flee as fast as they can caper doctor and used to it. Furthermore, he probably had room for only one emotion at the moment—relief at the return of his patient. Miss Jerrems came back, wheeling a large cart. Dan was surprised at the mass of records. Crander noticed his expression and smiled. "You're He turned to the woman. "You may leave, Miss Jerrems." She went, but the adoration she had showed so openly for her employer seemed to have curdled in the last few moments. certain. Taken altogether, the evidence was overwhelming. There had been no mistake—he was Dan Merrol, though it was not difficult to understand why Erica couldn't believe he was her husband. "You did a fine job," he said. Recalling the picture of the wreckage, "Brain?" Dan was startled.

<question>:
Why did the receptionist at the hospital laugh at the Dan?

<options>:
A His physical appearance was comical
B His request to see the Dr. without an appointment was absurd
C He clumsily brushed her on the shoulder.
D She was surprised to see that he had returned

<answer>:

A