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!" Betty frowned at him. Koslow Spaceways, glowered back at him. Its reddish tinge brightened the office noticeably, for such of Ganymede's surface as could be seen through the transparent dome outside the office window was cold, dim here and there on the cargoes never shows by the time figures get back to Earth. The big jets in the home office don't care. They count it on the estimates." "You asked any of them lately?" Tolliver prodded. hazardous duty!" "Doesn't matter," answered Tolliver, grinning amiably. "The hazardous part is just being on the same moon as you for the next six months." He winked and walked out, deliberately leaving the door open behind him so as to enjoy the incoherent bellowing that followed him. around. I just want to get back to Earth with a clean rep. Let Jeffers and his gang steal the Great Red Spot off Jupiter if they like! It's which was "Tuesday" On the bulletin board, Tolliver's name stood out beside the number spaceport, or for hauling cross-country to one of the mining domes. He soon found that there was nothing for him to do but hang around the garage in case a spaceship should land. The few runs to other domes seemed to be assigned to drivers with larger vehicles. The following day was just as boring, and the next more so. He swore "Hey, Johnny!" said a voice at his shoulder. "The word is that they're "What do you mean?" "They say some home-office relative is coming in on the Javelin handing out soft jobs to nephews, I mean." "Aah, these young punks just come out for a few months so they can go back to Earth making noises like spacemen. Sometimes there's no reason airlock, a crewman helped him load two trunks and a collection of bags into the tractor. He was struggling to suppress a feeling of outrage at the waste of fuel involved when the home-office relative emerged. Tolliver. "By the way, just call me Betty." "Don't be silly. Daddy says I'm supposed to learn traffic routing and the business management of a local branch. They probably won't let me see much else." "You can call me Betty. What happened to him?" He enlarged upon other dangers to be encountered on the satellite, taking care to impress the newcomer with the daredeviltry of John Tolliver, driver of "missions" across the menacing wastes between dome 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 prickled. "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. "Miss Koslow!" he beamed, like a politician the day before the voting. "It certainly is an honor to have you on Ganymede with us! That's all, Tolliver, you can go. Yes, indeed! Mr. Koslow—the president, that is: your father—sent a message about you. I repeat, it will be an honor to pilot stared at Betty, trying to recall pictures he had seen of the elder Koslow. He was also trying to remember some of the lies he had told en route from the spaceport. "Wh-wh-what do you mean, Miss Koslow?" Jeffers stammered. He darted a suspicious glare at Tolliver. "Daddy gave me the title of tenth vice-president mostly as a joke, when he told me to find out what was wrong with operations on Ganymede. I have fired!" Betty, and Tolliver thought he muttered something about "just landed." intercom button with his finger. He growled at someone on the other end headquarters staff. He recognized one as Rawlins, a warehouse chief, and guessed that the other two might be his assistants. They were large enough. Betty. The others were swarming over Tolliver. Jeffers came around his desk to assist. Tolliver found himself dumped on the floor of an empty office in the adjoining warehouse building. It seemed to him that a long time had been spent in carrying him there. "Your paycheck," said Betty. "As soon as I saw that ridiculous amount, "What do you know about the crooked goings-on here?" asked Betty after "What do you think you're up to?" asked Betty with some concern. emergency dome of transparent plastic. They soon reached the other end. "I think there's a storeroom for spacesuits around here," muttered Tolliver. "Why do you want them?" "Honey, I just don't think it will be so easy to lay hands on a tractor. I bet Jeffers already phoned the garage and all the airlocks "Just act as if you're on business," he told her. "For all anyone can "Where are you going?" asked Betty. !" "Is there any way to get to a TV?" asked the girl. "I ... uh ... Daddy gave me a good number to call if I needed help." "How good?" From the corner of his eye, he thought he saw Betty make a startled surface. Fumbling, he cut as fast as he could and shoved Betty through Don't be here when they do! He grabbed Betty by the wrist of her spacesuit and headed for the to get in to stay out of trouble," he said to Betty. and then Tolliver led the way up another ladder to the control room. It was a clumsy trip in their spacesuits, but he wanted to save time. "Takeoff!" shrilled Betty. "What do you think you're going to do? I dials!" economy orbit for Earth. He busied himself making a few adjustments, doing his best to ignore the protests from his partner in crime. He warned her the trip might be long. "That wasn't so bad," Betty admitted some time later. "Did you go in "Oh!" Betty looked helpless. "It's in my pocket." 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 uniform. "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 When he heard Betty requesting assistance in arresting Jeffers and 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. "We do have one trouble," he heard Betty saying. "This tractor driver, "Actually, I have a fine idea," he informed the officer coldly. "I happen to be a qualified space pilot. Everything here is under control. If Miss Koslow thinks you should arrest Jeffers, you can call us later on this channel." "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 about that." "Relax, Tolliver," she told him. "Did you really believe Daddy would send his own little girl way out here to Ganymede to look for whoever "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," Tolliver finished for her. "I guess it's better this way," he said picked up."

<question>:
What was the number that Betty called?

<options>:
A To her Space Patrol colleagues
B To the family’s private security team
C To the Ganymede superiors
D To Daddy’s private office at Koslow Space headquarters

<answer>:

A