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

<passage>:
"Who?" "Remember Junie O'Brien? The little golden-haired girl on Mars, a mathematical prodigy, but dying of an incurable disease? She collected Matheny stared out the wall, his hands twisting nervously behind his She peeled it off again and slipped on a casual bathrobe: a wisp of 'What mysterious knowledge did the Old Martians possess? What was After all, some of the men who knew her private number were important. she said automatically. "So sorry to keep you waiting. I was just "Well, hurry up with whatever it is," snapped Peri. "I got a date "That's about all, so far," confessed Matheny. "Perhaps a con is our Peri narrowed her silver-blue gaze and looked icily at him. "You must "Yes?" Matheny faced around, shivering with his own tension. Doran's thin sharp face grinned. "You break that date, Peri. Put it off "So? Since when has all Mars had as much spending money as one big-time "Sure, sure. But how much are those boys going to spend on any girl, Peri's peaches-and-cream countenance began to resemble peaches and cream left overnight on Pluto. "Badger?" she asked. The gravity was not as hard to take as Peter Matheny had expected. What set him gasping was the air. It weighed like a ton of wool and had apparently sopped up half the Atlantic Ocean. Ears trained to listen "Oh, we don't expect immigration," said Matheny shyly. He was a fairly young man, but small, with a dark-thatched, snub-nosed, gray-eyed that no one is interested any more in giving up even second-class "Thanks," said Matheny, "but, you see, I—we need—that is.... Oh, him against the rail. For a moment, squashed to the wire, he stared a hundred feet down at the river of automobiles. he thought wildly. If the barrier gives, I'll be sliced in two by a dorsal fin before I hit the pavement! The August twilight wrapped him in heat and stickiness. He could see Why did they tap me for this job? he asked himself in a surge of He, Peter Matheny, was no more than a peaceful professor of , thought Matheny, The city roared at him. He fumbled after his pipe. Of course , he told himself, who was happily trying to mark the cards. Matheny would have found a few spins of roulette soothing: it was always an intellectual challenge Matheny puffed smoke and looked around. His feet ached from the weight "I—I'm not hungry," stammered Matheny. "I just wanted to sit in—" "Hm?" said Matheny. She explained. He bought a few hundred-dollar tokens, dropped a passes he had made were unsuccessful. Earth gravity threw him off. But when he got the rhythm of it, he tossed a row of sevens. It was a "You did all right, brother," said a middle-aged lady with an obviously "Oh—I see—excuse me, I, I, I—" Matheny backed out of the crowd, "Oh. Thanks. Thanks ever so much. I, I, that is—" Matheny cursed Damn it, just because they're so much more Matheny had yet heard. "Yes. Yes, I am. M-my name's Peter Matheny. I, I—" He stuck out his forgot this was a church. Never mind the chips. No, please. I just want Matheny sighed. "A drink is what I need the very most." They walked back to the deaconette's booth and Matheny cashed what "Nah. I am not doing one thing in particular. Besides, I have never met "There aren't many of us on Earth," agreed Matheny. "Just a small "We can't afford it," said Matheny. "What with gravitation and "I always wanted to," said Doran. "I would like to see the what they girl one of those Old Martian rings last Ike's Birthday and she was me for it!" He winked and nudged. "Oh," said Matheny. He felt a certain guilt. Doran was too pleasant a little man to "Of course," Matheny said ritually, "I agree with all the archeologists "I do know," said Matheny. "But we're poor—a handful of people trying export enough to Earth to earn those dollars." By that time, they were entering the Paul Bunyan Knotty Pine Bar &amp Grill, on the 73rd Level. Matheny's jaw clanked down. Matheny followed Doran past a sign announcing that this show was for Matheny shuddered. "Good Lord, no!" "Have you not got some other business?" I Was a Slave Girl on Mars . "Our most prominent novelist was co-opted to ghostwrite that one. "It was our mainstay," admitted Matheny, "but it's been overworked. "Of course," said Matheny bitterly. "We offer the most liberal But who's interested? We haven't a thing that Earth hasn't got more "Beer," said Matheny without hesitation. Matheny shrugged. "I haven't told you anything that isn't known to The beer arrived. Matheny engulfed himself in it. Doran sipped at a "Ahhh!" said Matheny. "Bless you, my friend." "Oh, we're not Matheny's finger stabbed in the general direction of Doran's pajama Matheny felt his eloquence running down and grabbed for the second "But where do I start?" he asked plaintively, for his loneliness smote him anew. "I'm just a college professor at home. How would I even get "It might be arranged," said Doran in a thoughtful tone. "It just "I could offer a certain amount of, uh, lagniappe," said Matheny. "That Matheny found himself warming. Gus Doran was an authentic bobber. A friendship ... well, anyhow, let's not talk business now. If you have he laughed at Matheny's, though they were probably too rustic for a "What I really want," said Matheny, "what I really want—I mean what "A what?" "A con by any other name," said Matheny, pouring down an akvavit. "No." Matheny realized his head was a bit smoky. The walls of the booth "By all means." Matheny disposed of his last beer. "I could use some ," said Matheny. "If I don't mean "Whoof!" Matheny sat down. The chair slithered sensuously about his "What?" swivel mounting, and she just loves exotics. Such as you." "Me?" Matheny heard his voice climb to a schoolboy squeak. "Me? Exotic? Why, I'm just a little college professor. I g-g-g, that is—" His tongue got stuck on his palate. He pulled it loose and moistened uncertain lips. "You are from Mars. Okay? So you fought bushcats barehanded in an abandoned canal." "What's a bushcat? And we don't have canals. The evaporation rate—" "Look, Pete," said Doran patiently. "She don't have to know that, does she?" While Matheny jittered about, shaving and showering and struggling with "What?" Matheny gaped out of the bathroom. Matheny hesitated. If only he hadn't taken that last shot! It made him want to say yes, immediately, without reservations. And therefore maybe "What? But—but—" Matheny hung onto himself and tried to believe that "I know." Matheny stared, embarrassed, at the carpet. "I'm sorry "Oh, it's simple enough," said Matheny. "It's only that we already are Huh? Well, why, but—" without security. I told you about my girl friend, didn't I?" "Yes, and that calls to mind the Little Girl," said Matheny

<question>:
Why was the girl interested in Matheny?

<options>:
A He was exotic
B He was a college professor
C He had a large expense account
D He fought bushcats barehanded in a canal

<answer>:

C