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

<passage>:
"Great!" muttered Betty. "What a lucky girl I am!" "I can see you're used to sweeping girls off their feet," she commented sourly. "The main problem is whether you can cook." Betty frowned at him. "I'm pretty good with a pistol," she offered, "or going over crooked books. But cook? Sorry." , he promised himself, I'll explain how I cut the fuel flow and see if she's detective enough to suspect that we're just orbiting Ganymede! his body. It had been built for Ganymede, but not for Jeffers. "What do you mean?" "They say some home-office relative is coming in on the the waste of fuel involved when the home-office relative emerged. She was about five feet four and moved as if she walked lightly even in stronger gravity than Ganymede's. Her trim coiffure was a shade too sweater, like a spacer. "Sorry to keep you waiting," she said, sliding into the seat beside Tolliver. "By the way, just call me Betty." "Sure," agreed Tolliver thinking, Ohmigod! Trying already to be just one of the gang, instead of Lady Betty! Is her old man the treasurer, or does he just know where bodies are buried? "They were making dates," said the girl. "Were they ribbing me, or is "It's true enough," Tolliver assured her. "We need people out here, and it costs a lot to make the trip. They found they could send back loaded frozen surface of Ganymede toward the permanent domes of the city. square inch of Ganymede is likely to be dangerous." "Don't sneer at Ganymede, honey!" he warned portentously. "Many a man who did isn't here today. Take the fellow who used to drive this mission!" "You can call me Betty. What happened to him?" "I'll tell you some day," Tolliver promised darkly. "This moon can "Oh, they told me there was nothing alive on Ganymede!" In the end, he displayed conclusive evidence in the form of the weekly paycheck he had received that morning. It did not, naturally, indicate he was drawing the salary of a space pilot. Betty looked thoughtful. pile. No use pushing your luck too far." His charge seemed noticeably subdued, but cleared her throat to request that Tolliver guide her to the office of the manager. She trailed along as if with a burden of worry upon her mind, and the pilot's conscience Remembering his grudge against the manager, he took pleasure in walking in without knocking. "Jeffers," he announced, "this is ... just call her Betty." The manager's jowled features twisted into an expression of welcome as jovial as that of a hungry crocodile. "It certainly is an honor to have you on Ganymede with us! That's all, "Never mind him, Mr. Jeffers," snapped the girl, in a tone new to Tolliver. "We won't be working together, I'm afraid. You've already had lips twitched uncertainly, and he looked questioningly to Tolliver. The pilot stared at Betty, trying to recall pictures he had seen of the he told me to find out what was wrong with operations on Ganymede. Betty, and Tolliver thought he muttered something about "just landed." headquarters staff. He recognized one as Rawlins, a warehouse chief, and guessed that the other two might be his assistants. They were large "Why should we try?" asked the girl. "What can he do?" "You'd be surprised. How did you catch on to him so soon?" "Your paycheck," said Betty. "As soon as I saw that ridiculous amount, get out of here—before I find myself involved in some kind of fatal accident!" "What do you know about the crooked goings-on here?" asked Betty after a startled pause. at the doorway, and pulled out his cigarette lighter. "What do you think you're up to?" asked Betty with some concern. the daughter of the boss isn't something that he can pull off without a lot of investigation. He'd be better off just running for it." "Let's not argue about it," said Betty, a trifle pale but looking determined. "I'm coming with you. Is that stuff getting soft yet?" dozen or so serviced and standing ready for emergencies. He showed Betty how to climb into one, and checked her seals and valves after donning a suit himself. He caught up and touched helmets again. "Just act as if you're on business," he told her. "For all anyone can see, we might be inspecting the dome." "Where are you going?" asked Betty. furtively about, then plunged his knife into the transparent material. From the corner of his eye, he thought he saw Betty make a startled gesture, but he had his work cut out for him. This was tougher than the dusty, moist air puffing out into the near-vacuum of Ganymede's surface. Fumbling, he cut as fast as he could and shoved Betty through the small opening. Squeezing through in his turn, he left one arm inside to spread the He grabbed Betty by the wrist of her spacesuit and headed for the nearest outcropping of rock. It promptly developed that she had something to learn about running on ice in such low gravity. Until they were out of direct line of sight Ganymede. They took one short rest, during which Tolliver was forced "In fact, we have to get in to stay out of trouble," he said to Betty. "Leave the suit on," he ordered, getting in the first word while she was still shaking her head. "It will help a little on the takeoff." "Takeoff!" shrilled Betty. "What do you think you're going to do? I just want to use the radio or TV!" and then it was out of his hands for several minutes. "That wasn't so bad," Betty admitted some time later. "Did you go in the right direction?" "Who knows?" retorted Tolliver. "There wasn't time to check her out of the spacesuit. He thought of inquiring if she needed any further help, but reminded himself that this was the boss's daughter. When Betty produced a memo giving frequency and call sign, he set about making contact. It took only a few minutes, as if the channel had been monitored "Space Patrol?" whispered Tolliver incredulously. "That's right," said Betty. "Uh ... Daddy made arrangements for me." Tolliver held her in front of the screen so she would not float out of range of the scanner and microphone. As she spoke, he stared could arrange for a cruiser to escort his daughter to Ganymede and wondering what was behind it all. When he heard Betty requesting assistance in arresting Jeffers and reporting the manager as the head of a ring of crooks, he began to suspect. He also noticed certain peculiarities about the remarks of the Patrolman. For one thing, though the officer seemed well acquainted with Betty, he never addressed her by the name of Koslow. For another, he accepted the request as if he had been hanging in orbit merely until learning who to go down after. They really sent her out to nail someone course, she stumbled onto Jeffers by plain dumb luck. But she had an idea of what to look for. How do I get into these things? She might have got me killed! "We do have one trouble," he heard Betty saying. "This tractor driver, "Miss Koslow?" repeated the spacer. "Did she tell you—well, no matter! If you'll be okay, we'll attend to the other affair immediately." He signed off promptly. The pilot faced Betty, who looked more offended than reassured at discovering his status. "This 'Miss Koslow' business," he said suspiciously. "He sounded funny send his own little girl way out here to Ganymede to look for whoever was gypping him?" "You ... you...?" "Sure. The name's Betty Hanlon. I work for a private investigating firm. If old Koslow had a son to impersonate—" "I'd be stuck for six months in this orbit with some brash young man,"

<question>:
Why had Betty really come to Ganymede?

<options>:
A to stay as long as it takes to discover who was behaving illegally
B to arrest Jeffers for the crimes they knew he committed
C to study how the business was run
D to see if the real Betty could handle working there

<answer>:

A