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 U.S. copyright on this publication was renewed.] There is nothing at all like having a sound mind in a sound body, but Dan Merrol had too much of one—and also too much of the other! "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 doing here then?" "Can't you remember?" Her laughter tinkled as she pushed him away and sat up. "They said you were Dan Merrol at the hospital, but they must have been wrong." "Hospitals don't make that kind of mistake," he said with a certainty me ." "I wish you could." Her voice was low and sad and he couldn't guess why. "My name is Dan Merrol." "They told you that at the hospital." They hadn't—he'd read it on the chart. But he had been alone in the room and the name had to be his, and anyway he felt like Dan Merrol. "Your name is Erica." "They told you that too." realized how strong you were. Dan was always too gentle—he must have been afraid of me. And you He did—it was a mark level with his chin. "What does it mean?" "That should be the top of Dan Merrol's head," she said softly. He was a good six inches taller than he ought to be. But there must be some explanation for the added height. He glanced down at his legs. 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'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 mind frantically and the words came out. "Self-therapy," he said and carry them through by himself, even though running a slight risk of physical complications." 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 were the pilot. They never let me see you until yesterday and then it was just a glimpse. I took their word when they said you were Dan Merrol." At least he knew who or what Dan Merrol was—the pilot of the Mars liner. They had assumed he was the pilot because of where he was found, but he might have been tossed there—impact did strange things. Dan Merrol was a spaceship pilot and he hadn't included it among his skills. It was strange that she had believed him at all. But now that it was out in the open, he did remember some facts about spaceships. He "They said they'd identified everyone, living or dead, and I supposed they had. After seeing you, I can believe they made any number of similar mistakes. Dan Merrol may be alive under another name. It will be hard to do, but I must try to find him. Some of the accident victims went to other hospitals, you know, the ones located nearest where they It might be wrong, but it was very pleasant, though he did guess her She blinked at him. "A patient?" She didn't need to look twice to see 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." Doctor Crander tried to fight his way through the desk. Being a little wider and solider, though not by much, the desk won. He contented "Then I am Dan Merrol?" 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 know how a patient from the regrowth tanks was supposed to act. his bewildered patient. you there an extra week has paid off very, very nicely." Merrol wasn't as pleased as the doctor appeared to be. "Granted you can identify me as the person who came out of regrowth—but does that mean I'm Dan Merrol? Could there be a mistake?" Crander eyed him clinically. "We don't ordinarily do this—but it is evident that with you peace of mind is more important than procedure. And you look well enough to stand the physical strain." He pressed the buzzer and an angular woman in her early forties answered. "Miss Jerrems, the Dan Merrol file." 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 goldfish and she darted from the room. They see me and flee as fast as they can caper , thought Merrol. It was not wholly true—Crander didn't seem much affected. But he was a doctor and used to it. Furthermore, he probably had room for only one Miss Jerrems came back, wheeling a large cart. Dan was surprised at the mass of records. Crander noticed his expression and smiled. "You're our prize case, Merrol. I've never heard of anyone else surviving such extensive surgery. Naturally, we have a step-by-step account of everything we did." company for which you worked." Merrol winced. The photographic sequence was incontrovertible. He had been a handsome fellow. "Here is other evidence you may not have heard of. It's a recent it's the last word." Merrol studied the patterns of waves and lines and splotches. "What is it?" The mass-cell radiographs did seem identical and Dr. Crander seemed 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, ?" cried the doctor. "Do you have any idea of the of surgical skill." He moved the hand experimentally, to show Merrol "That's the beginning, but at the sensory organs we leave the simple stuff behind. Take the eye, for instance." Merrol leaned away because Dr. Crander seemed about to pluck one of Dan's eyes from its socket. bundle pass any layman's comprehension. There are no non-technical terms to describe it." It was just as well—Merrol didn't want a lecture. He extended his arms. One was of normal length, the other longer. "Do you think you can do something with this? I don't mind variation in thickness—some of other operations and your nervous system isn't up to it." He shook his head. "Five years from now, we can help you, not before." Merrol turned away miserably. There were other things, but he had learned the essentials. He was Dan Merrol and there was nothing they could do for him until it was too late. How long could he expect Erica to wait? head." Merrol obeyed and could feel the doctor's forefinger slice across his scalp in a mock operation. "This sector was crushed." Roughly half his brain, it appeared. "That's why so many memories were gone—not just Kaufman, musician—Breed Mannly, cowboy actor—George Elkins, lepidopterist—Duke DeCaesares, wrestler—and Ben Eisenberg, mathematician, went into the places I tapped." Dan raised his head. Some things were clearer. The memories were

<question>:
Who did the patient that was identified as Dan Merrol end up actually being?

<options>:
A An unknown survivor of the wreck
B Samuel Kaufman
C Doctor Crander
D Dan Merrol himself

<answer>:

D