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

<passage>:
pitch on a Venusian swamp-town—to find that death stalked it from the I said, "Bucky. Hold on, fella. I...." Bucky heaved the table off his lap and cursed me. "What's eating you, than you could see through sheet metal. I didn't like him. I didn't like him at all. But he had money. I said, "Howdy. Let's go find a booth. These Marshies make me nervous, looking like hungry cats at a mouse-hole." I looked at Bucky. He looked hungrier than the Marshies did. We didn't Bucky got red around the ears. "Just a minute," he murmured, and The curtains were yanked back suddenly. Beamish shut up. Bucky and I "Gertrude be blowed," growled Bucky. "Can't you see I'm busy?" He pulled the curtains to and departed. Bucky Shannon groaned. Beamish "Yeah. She's kind of temperamental." Bucky took a quick drink. I We said good night, trying not to drool. Beamish went away. Bucky made poked his head outside. "Hey, boy! More Shannon's Imperial Circus was crouching beneath its attachments. Late as it was, they were waiting for us. About twenty of them, sitting around and smoking and looking very ugly. It was awfully lonesome out there, with the desert cold and restless Bucky Shannon walked out into the glare of the light at the entrance to feet. He waved and said, "Hiya, boys." They got up off the steps, and the packing cases, and came toward us. I grinned and got into my brassies. We felt we owed those boys a lot more than money. It grates on a man's pride to have to sneak in and out of weeks we'd come in at the front door. Bucky and I checked the bills, paid them, and pocketed the receipts. Bucky yawned and stretched sleepily. Bucky Shannon regarded them possessively, wiping blood from his nose. I said, "Sure," rather sourly. Bucky hiccoughed. "Let's go see Gertrude." I didn't want to see Gertrude. I never got over feeling funny going into the brute tank, especially at night or out in space. I'm a city Bucky was looking stubborn, so I shrugged. The fight had just put the topper on him. I was afraid he'd fall down the ladder and break his neck. That's why I went along. If I hadn't.... Oh, well, what's a few nightmares among friends? Our footsteps sounded loud and empty on the iron floor. I wasn't rank and sour and wild. And the sound of them, Bucky Shannon lurched against me suddenly. I choked back a yell, and had them nicely conditioned to that gong. But they didn't quiet down. Not really. They were uneasy. You can feel them inside you when they're uneasy. I think that's why I'm scared of them. They make me feel like I'm not human as I thought—like I wanted to put my back-hair up and snarl. Yeah. They were uneasy that night, all of a sudden.... Bucky Shannon sniffled again. I said irritably, "Be reasonable, Gow! rose up out of the darkness in little lazy coils, sparkling faintly with blue, cold fire. I yelled, "Gow! Gow, the Vapor snakes! Gow—for God's sake!" I started to run, back along the passageway. Bucky weighed on me, limp and heavy. The noise burst suddenly in a deafening hell of moans and I could hear Gertrude's lonely, whistling scream. I thought, " Somebody's down here. Somebody let 'em out. Somebody wants to kill us! One of Bucky's dragging, stumbling feet got between mine. We fell. I rolled on top of him, covering his face, and buried my own face in the hollow of his shoulder. The first snake touched me. It was like a live wire, sliding along the back of my neck. I screamed. It came down along my cheek, hunting my mouth. There were more of them, burning me through my clothes. Bucky moaned and kicked under me. I remember hanging on and thinking, "This is it. This is it, and oh God, I'm scared!" Then I went out. said, "Where's Shannon? How is he?" "Mis' Bucky okay. You save life. You big hero, Mis' Jig. Mis' Gow come nickuhtime get snakes. You hero. Haw! You funny like hell!" I said, "Yeah," and pushed him away and got up. I almost fell down a couple of times, but presently I made it to the mirror over the snakes had done a good job. I looked like I was upholstered in Scotch plaid. I felt sick. Bucky Shannon opened the door. He looked white and grim, and there was I picked up my shirt. "Right with you." Kanza went out, still giggling. Bucky closed the door. "Jig," he said, "those vapor worms were all right when we went in. Somebody followed us down and let them out. On purpose." I hurt all over. I growled, "With that brain, son, you should go far. Nobody saw anything, of course?" Bucky shook his head. latch and looked at my feet. "And—uh—Jig, I...." I said, "Skip it. The next time, just don't trip me up, that's all!" We had a nasty trip to Venus. Gertrude kept the brute tank on edge, and Gow, on the rare occasions he came up for air, went around looking kittens. Nobody would have minded that, only one of 'em had only four legs. It lived just long enough to scare that bunch of superstitious dopes out of their pants. Circus people are funny that way. Shannon and I did a little quiet sleuthing, but it was a waste of time. Anybody in the gang might have let those electric worms out on us. It didn't help any to know that somebody, maybe the guy next to you at dinner, was busy thinking ways to kill you. By the time we hit Venus, I was ready to do a Brodie out the refuse chute. our router's runabout beside it. Bucky Shannon groaned. I snarled, "What do you want, with this lousy dog-and-pony show!" and went out. He followed. The gang was converging on the lock, but they weren't happy. You get so you can feel those things. The steamy Venus heat was already sneaking into the ship. While we passed the hatchway to the brute tank, I could hear Gertrude, screaming. The canvasmen were busy setting up the annex, slopping and cursing in the mud. The paste brigade was heading for the shacks. Shannon and I Bucky said, "Jig—it's Sam Kapper." Bucky started to help him up. Kapper was crying, and he jerked all over like animals I've seen that were scared to death. Some guy leaned over and put a cigarette in his mouth and lighted it for him. I was thinking about Kapper, then, and I didn't pay much attention. I Bucky said gently, "Okay, Sam. Relax. What's the trouble?" The cigarette stub fell out of his mouth. He didn't notice it. "Help me," he said simply. "I'm scared." His mouth drooled. "I got it hidden. They want to find out, but I won't tell 'em. It's got to go back. Back where I found it. I tried to take it, but they wouldn't let me, and I was afraid they'd find it...."

<question>:
Why did Jig and Bucky rarely come in through the front door?

<options>:
A They wanted to avoid the screams of Gertrude
B They wanted to avoid the debt collectors
C They preferred the back entrance as to be closer to the action
D They wanted to avoid the Vapor snakes

<answer>:

B