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

<passage>:
He snapped his fingers. He looked like a high-school kid. "Nothin' to it." She could see he was very proud. Very tired, too. He reached out to touch her. He hugged her. After a time he reached down and touched her swelling waist. It was like a benediction. "He'll be born on the Moon," he what she was doing to patch up their marriage. She turned her face away from the aisle, covered her cheek with her with Nellie Foster's name on it. Miss Eagen (which, her neat lapel button attested, was her name) made a penciled frown as lovely as her machined smile. "Some day," she told Marcia, "we won't have to ask the passengers if they're well. It's so huddle, fumbling with the card until it was crammed shapeless into her purse. Then from the depths of her guilt came rebellion. It was going to be all right. She was doing the biggest thing she'd ever done, and Jack would rise to the occasion, and it would be all right. It had to be all right.... After this—if this didn't work—there just would be nothing else she could do. She wasn't a scheming woman. No one would ever know how difficult it had been for her to think up the whole plan, to find Nellie Foster (someone Jack had never met) and to persuade Nellie to register for the trip and take the physical for her. She'd had to lie to Nellie, to make Nellie think she was brave and adventurous, and that she was just doing it to surprise Jack. Oh, he'd be surprised, all right. The flash walls on the field were being raised to keep the blow-by from about to blast off in seconds. She half-rose, then sank back, biting her lip. Silly ... Jack had said that—her fear of space was silly. He'd said it during the quarrel, and he'd roared at her, "And that's why you want me to come back—ground myself, be an Earth-lubber—so I can spare you the anguish of sitting home wondering if I'll come back alive!" And then he'd been sorry he'd shouted, and he sat by her, taking her "The Elsinore ?" She'd said it viciously, to taunt him, and something in her had been pleased at the dull flush that rose to his face. Everyone knew about the Elsinore validation—which meant that nobody knew he was taking endocrine treatments to put hair on his brainless head and restore his—Oh, the Jaywalker Even now she distinctly recalled the beginnings of the interplanetary cold that always seeped into the warm house when he talked about space, when he was about to leave her for it. And this time it was worse than ever before. He went on remorselessly, "Once the "It's all so dull!" she had flared, and then, "How can I be interested in what some blundering space-jockey did?" "Was it?" she'd yawned. "Could you do it?" "I—like to think I could," he said. "I'd hate to have to try." She'd shrugged. "Then it can't be very difficult, darling." She hadn't meant to be so cruel. Or so stupid. But when they were quarreling, or when he talked that repugnant, dedicated, other-world garble, something always went cold and furious and—lonely inside her, and made her fight back unfairly. After he'd gone—for good, he said—her anger had sustained her for a few weeks. Then, bleakly, she knew she'd go to the ends of Earth for again! thought Marcia furiously and then all emotion left her but cold, ravening fear as the rumble heightened. She tried to close she fought it, but it was too big and too soft. if she could push it out, push herself out, go back, back to Earth had been prepared for almost anything except this quality of peace and awe. She didn't know how long she had been sitting there, awestruck, spellbound, when she realized that she had to finish the job she'd started, and do it right now, this minute. It might already be too late ... she wished, suddenly, and for the very first time, that she'd pressed herself up out of the soft chair—it was difficult, because of "Come along," said Miss Eagen cheerfully. She put a firm arm around "Scared," said Marcia. "Why, what—is there to be scared of?" "I'm pregnant." "Well, that's no—You're what Miss Eagen did, swiftly and thoroughly. "You're so right," she breathed. She went to the small sink, stripping off her rubber gloves. "Not right away, Sue." Sue! No wonder he had found it so easy to walk out! here , on my ship!" "I'm pregnant, Jack," she said. She put out a hand to ward him off. She couldn't bear the thought of his realizing what she had done while he had his arms around her. "You are ? You—we—" He turned to Miss Eagen, who nodded once, her face wooden. "Just find it out?" This time Miss Eagen didn't react at all, and Marcia knew that she had "Spin ship," she replied immediately, and looked up at him pertly, like a kindergarten child who knows she has the right answer. He groaned. "You said you could do it." why ?" "Because," she said bleakly, "I learned long ago that a man grows to love what he has to fight for." "And you were going to make me fight for you and the child—even if the feet, his shoulders down, without looking at her. There was a stiff silence. Marcia looked up at Miss Eagen. "It's true, you know," she said. "A man grows to love the things he has to defend, no matter how he felt about them before." The stewardess looked at her, her face registering a strange mixture of husband, and don't you forget it." Miss Eagen's breath hissed in. Her eyes grew bright and she shook her Marcia bounced resentfully off the cot and stood aside. Petrucelli He looked at her and away, quickly. "Because, lady, when we start to spin, that outside bulkhead is going to be down finished, and the bed hung ludicrously to the wall like a walking fly. She thanked him timidly, and he ignored it and went out. "And why not?" "Because," said Miss Eagen, and in that moment she looked almost as in the early stages of pregnancy— always "But how?" asked Marcia, interested in spite of her resentment. "Convulsions. A battle royal between a glandular-level panic and a everything is known about it, but I would guess that pregnant women are especially susceptible because their protective reflexes, through and through, are much more easily stimulated." matter if he makes a mistake or takes too long." "But—but—" "But what?" Miss Eagen's composure seemed to have been blasted to shreds by the powerful currents of her indignation. Her eyes flashed. "You mean, but why doesn't he just work the ship while it's spinning the same way he does when it isn't?" He'll do it exactly right the first time, or not at all." Marcia was white and still. "I—I never—" these people...." "He will and he must. You surely know your husband." "I know him as well as you do." Miss Eagen's firm lips shut in a thin hard line. "Do as you like," she machine, like a harried bookkeeper on the last day of the month. Her lips formed his name, but she was silent. She watched him, his " Jack had said that to her once, long ago, when he still loved her. "... human damnfoolishness botching up the equations...." He had said that once, too. there was something between them—so big a thing that there was nothing for her to fear in it.

<question>:
Why did the woman have Nellie take a physical in her place?

<options>:
A She was expecting a baby
B She was a scheming woman
C She was brave and adventurous
D She was wanting to surprise her husband

<answer>:

A