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

<passage>:
"Now Fweep ain't the brightest creature in the Universe, so he can't understand why we're so gosh-fired eager to leave. And as long as he's got Four, he's happy. Why should he make himself unhappy? As a favor to Four, he'd let us leave—if we'd leave Four here with him, which we ain't gonna do. "That's the problem. All we got to do is figure out the answer. No use Four? He's the only one who understands this thing." "He's outside, playing in the meadow with Fweep," Reba said, her voice soft. "No, here they come now." remarkably alike, although some vital element seemed to have dwindled until Four looked pale and thin-faced and wizened. "And, Four," Reba said automatically, "don't call your father 'Junior.' It sounds disrespectful." Reba was Four's mother and Junior's wife. On her own, she was a red-haired beauty with the loveliest figure this side of Antares. That Junior had won her was, to Grampa, the most hopeful thing he had ever noticed about the boy. "But everybody calls Junior 'Junior,'" Four complained. "Besides, Fred is Junior's father and Junior calls him 'Fred.'" "That's different," Reba said. "Stop picking on Junior," Joyce said sharply. She was Junior's mother and Fred's wife, still slim and handsome as she approached sixty, but somehow ice water had replaced the warm blood in her veins. "I'm sure "It belongs to all of us," Four said shrilly. "You gave us all a sixth share." for it. No dad-blamed machine is gonna outthink Grampa!" He snorted indignantly. Four shrugged his narrow shoulders and wandered to the view screen. "Four!" Reba called out warningly. "It's all right, Reba," Four assured her. "The air is within one per cent of Earth-normal and the bio-analyzer can find no micro-organisms It opened a raspberry-color pseudo-mouth and said plaintively, "Fweep? Fweep?" Joyce drew her chair farther back toward the wall, revulsion on her face. "Four! Get that nasty thing out of here!" "You mean Fweep?" Four asked in astonishment. "I mean that thing, whatever you call it." Joyce fluttered her hand impatiently. "Get it out!" Four's eyes widened farther. "But Fweep's my friend." "Nonsense!" Joyce said sharply. "Earthmen don't make friends with "Fweep?" queried the raspberry lips. "Fweep?" "If it's Four's friend," Reba said firmly, "it can stay. If you don't like to be around it, Grammy, you can always go to your own room." Joyce stood up indignantly. "Well! And don't call me 'Grammy!' It makes "Fweep?" asked the blob. had the nerve." "Why, thanks, Grampa," Reba said, surprised. "I like you, gal. Never forget it." "I like you, too, Grampa. If you'd been a few years younger, Junior would have had competition!" "You bet he would!" Grampa leaned back and cackled. Then he leaned and to himself, too." Reba smiled at Grampa brilliantly. "And maybe I thought he might grow into a man like his grandfather." Grampa turned red and looked quickly toward Four. The boy was staring intently at Fweep. "What you doing, Four?" four each—" "That's right," Four agreed. "I can make you a new one by cannibalizing the bottle away. "What is that stuff you drink, Grampa?" Four asked. "Tonic, boy. Keeps me young and frisky. Now about that pircuit—" "Did you ever work on Niccolò Tartaglia's puzzle about the three lovely "Yep," Grampa said. "Too easy." Four thought a moment. "There's a modern variation with three "Then we've wasted another week on a worthless rock," Joyce complained. She turned savagely on Fred. "This was going to make us all filthy glared venomously at Grampa. "We've still got Fweepland," Four said solemnly. Joyce spun on him. "You're joking!" she screeched. Junior frowned at his wife. "I believe you're actually glad it happened." "I could think of worse things," Reba said. "I like your spunk, Reb," Grampa muttered. "Speaking of children," Junior said, "where's Four?" "Fweep?" it queried hopefully. "That's impossible," said Junior. "Not for Fweep," Four replied. "What do you mean by that?" Joyce suspiciously asked. "It shifted," Four explained patiently, "because Fweep kept following "Fweep?" Junior repeated stupidly. "Fweep?" Fweep said eagerly. Four," he said, holding out the pircuit proudly. "A missionary takes over a non-rowing type cannibal, leaves him there, and then the rowing cannibal takes over the other cannibal and leaves him there and—" "Not now, Grampa," Four said inattentively as he watched Fweep making absorbed them. Four looked at Joyce. Joyce was watching Fweep, too. Joyce started guiltily. "How did you know?" "There's no use trying to poison Fweep," Four said calmly. "He's got no "And blow him up? I don't think it's possible, but even if it were, it might be a trifle more than disastrous for us." Four giggled at the thought. Joyce glared at him furiously. "Four! Act your age! We've got to do something with him. It's preposterous that we should be detained here at the whim of a mere blob!" "I don't care why that thing does it," Joyce said icily. "I want it "How?" asked Four. "Fweep's skin is pretty close to impervious and "But he must have some way of reproduction," Reba argued. "An egg or something. He couldn't just have sprung into being as he is now." "Maybe he developed," Four offered. "It seems to me that he's bigger than when we first landed." "He must have been here a long, long time," "I thank him for nothing," Joyce snapped. "He lured us down here by "If he can eat anything," Reba said, "why does he keep sweeping the cabin for dust and lint?" "He wants to be helpful," Four replied without hesitation, "and he's lonely. After all," he added wistfully, "he's never had any friends." "How do you know all these things?" Joyce asked from her doorway, Four's lap. It nestled against him lovingly and opened raspberry lips. "Fwiend," it said. "Well, now," Grampa said maliciously, his eye on Joyce, "that's no a sacrifice to ask, but—" "Joyce!" Reba cried, horrified. "Grampa was joking, but you actually mean it. Four is only a baby and yet you'd let him—" "Never mind, Reba," Four said evenly. "It was just what I was going to suggest myself. It's the one really logical solution." it would only say that the logical answer is the one I sug—" "Mother!" Junior warned. "We decided not to talk about it any more. Four is strange enough without encouraging him to think like a martyr. It's out of the question. If that's the only way we can leave this "Well!" Joyce said in a stiff, offended tone and sat back in her chair. because he doesn't like gravity that's polarized in a straight line, and he don't want Four to leave him.

<question>:
Why did Joyce try to poison Fweep?

<options>:
A She was mad at everyone
B She wanted to leave the planet
C She was afraid of his radioactivity
D She was jealous of how much Four liked him

<answer>:

B