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

<passage>:
Casey Ritter, the guy who never turned down a dare, breathed a prayer to the gods in a manner of speaking, for this doctor to experiment with. He wasn't going to sell them for dope. But—and this was the 'but' that was also, I had promised not to rat on him before taking the job. Well, Casey Ritter may be a lot of things we won't mention, but he doesn't rat on his clients. So there I was, closeted with the ten court didn't seem important just then. Jupiter was worse than the pen, then nodded at the judge on his right. This bird, a little old hank of dried-up straw, joined his fingertips carefully, cleared his scrawny throat, and told me what for. the Red Spot of the planet, floating in some kind of artificial I snorted. "Aw, hell, judge, that's just one of those screwy fairy little story teller patiently cleared his skinny throat again. say, eminently suited to the task." when I already had more counts against me than a cur has fleas. Not unless it was a straight suicide mission! I feebly massaged my throat. "Pictures?" I whispered. "Show me 'em." Crude, but it was all I could squeeze out. inhabitants were charming, just charming if you like scorpions. Well, He shrugged, trying for nonchalance. "About the size of a man, I believe." I raised my shrinking head. "Take me to jail!" I said firmly, and collapsed onto my chair. A crafty-eyed buzzard across the table leaned toward me. "So this is the great Casey Ritter, daredevil of the Solar System!" he sneered. "Never loses a bet, never turns down a dare!" I shuddered. "You're telling that one! And besides, a man's got to draw it. Nuts! After all, in the pen a man can eat and breathe, and a guard won't reach in and nip off an arm or leg while he's got his back turned. How stupid could they get? At this strategic point, the enemy planted a stoolie on me. Not in my I was right. I'd met the shrimp before when I was wound up in an made a pass at the Killicut Emeralds, that's all, and got nabbed." eggs, an even dozen of 'em and flawless, I'm a-shoutin', not a flaw!" His eyes watered at the memory, yearning like a hound-dog's over a nothing but a heap of cleaned bones by now. Either he was the world's him. somehow knew that he'd really lifted those emeralds. But how? It was jelly, trying to figure that steal. The next morning I got up burning me. I chewed my fingernails down to the quick by the time he got out a with me. But he wouldn't tell me how he'd worked the steal. Instead, chisel me way outa this squirrel cage, I'm gonna hit fer good old Jupe and sell 'em to Akroida. She's nuts about jools. What that old girl won't give me fer 'em—" He whistled appreciatively, thinking about it. He looked at me as if I hadn't yet got out from under the rock where he remember?" He winked broadly. "It come from Mars in the first place, just leave 'em alone. That's all they want, just to be left alone. fer them. Besides, the space suit rig you got to wear, they can't bite so I brought her a hundred pounds of the stuff, an' she went fer that almost like it was diamonds, too. Did I rate around there fer awhile!" He sighed regretfully. "But then I went and made her mad, an' I'm kinda persona non grata there right now. By the time I gnaw outa this here cheese trap, though, I figger she'll be all cooled off and ready fer them emeralds." I went back to my cot that night, and this time instead of biting my nails, I bit myself. So I faced it. Casey Ritter lost his nerve, and along with it, the chance of a lifetime. A better man than me had alive. That thought ate me to the quick, and I began to wonder if it For three more days I worked down my knuckles, my nails being gone, while I sat around all hunched up, wondering feverishly if Pard would and the caper set up. There were a few bits of info that Pard had to mist was eatin' into the finish on my spacesuit, so I draped this hadn't helped me, they'd of done it, too. And Akroida claimed I done it a-purpose to upset her." Then he winked at me. "But then I got off in a corner and cooked up tiny bottle like that boy Aladdin clutching his little old lamp. slipped down onto the Red Desert of Mars and picked up the Killicut slobbering. But the Big Sneer of the S.S.C., the fellow that had got to remind me that this was public service, strictly. "These—" he had proclaimed with a disdainful flourish, like a placer them. And be assured that if you're man enough to effect the trade—" He paused, his long nose twitching cynically—"IF you succeed, your snarled at him. "Just you wait till I do, feller!" I slipped the string ice-cloud and turned me loose in a peanut of a space boat with old Jupe patted my pretty enameled suit, which was a study in paris green and But my green boat must have showed up like a lighthouse in all that a pair of stubby wings. He didn't seem to be making much effort, even though he was climbing vertically up from the planet. In fact, he lived. If that little shrimp could do it, I could, too. poor sinner's map was made of shell, and he wasn't responsible for its lady," I informed him. "However, I have something very special in the I thrust this sneak-thief idea back into limbo. Taking advantage of his condition, I boldly tapped out, "How's about taking me on a guided tour through this red spinach patch to Akroida, old pal?" Or words to that effect. He lolled his hideous cranium practically on my shoulder. "Anything! Just anything you desire, my dearest friend." I tried to back off from him a bit, but the ship stopped me. "I'm Casey Right there I forgave him for pulling that eye on me. He was the guide over his shoulder at my ship, so I eased in the controls and edge after It was red, like everything else in this screwy place, and could only space. put twelve or fifty feet up off the floor, it stayed there. Not that there wasn't gravity. There was plenty of gravity to suit me—just right, in fact—and still they had furniture sitting around in the air as solid as if on a floor. Which was fine for flying hopper-scorps, but what about Casey Ritter, who hadn't cultivated even a feather? Attaboy, however, had the answers for everything. Towing me from the airlock to the window ledge, he again sniffed that delectable odor on endured, and then without warning tossed me onto his back above the those hopper-scorps. I didn't need their particular brand of Morse Code name?" she demanded. And when he told her, with a bad stutter in his code, she reared up higher on her skinny elbow and glared in my direction. "Casey Ritter? Never heard of him. Where's he from?" Well, after all, she wasn't blind. He had to confess. "I—uh—the stones were so amazing, Royal Akroida, that I didn't pay much attention to the—uh—trader. He does seem to resemble an—ah—earthman." He

<question>:
What was the stoolie's job?

<options>:
A To find out Casey's smuggling secrets
B To get information from Casey to give to the S.S.C.
C To become Casey's friend and confidante
D To convince Casey to change his mind

<answer>:

D