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

<passage>:
MONOPOLY Sheer efficiency and good management can make a monopoly grow into being. And once it grows, someone with a tyrant mind is compound. This was the administrative heart of Venus City. Out here, the Venus Consolidated Research Organization, he was in large part responsible for the prosperity of this vigorous, young world. Venus Consolidated had built up this city and practically everything else monopolistic control. But, if they could not realize that the company's regime served the best interests of the planet, they would just have to of revolution among the disgruntled older families. He heard there had been killings, but that was nonsense. Venus Consolidated police had only powers of arrest. Anything involving uniform. "Sorry, sir, but one of those rebels is loose in the Administration Center somewhere. We're making a check-up of all the apartments." "Well, you can check out I haven't got any blasted rebels in here." "Oh, I see, sir. No rebels, of course. Sorry to have disturbed you. "All right, joke's over, you can beat it now." force." satisfaction of the unending extra work that was going to occur around "Quit stallin', bud. You know who. That female rebel who was in here." "Rebel? You're crazy! That was just ... Pete said ... rebel? Did you say rebel?" "Yeah, I said rebel, an' where is she?" Brian Hanson, Chief of Research for Venus Consolidated, as dignified as They're about the oldest family on Venus. Police have been after her she's a rebel and she's sure been raising plenty of hell anything about any damn rebels. All I want is to get out of here—" trouble because of me. But don't worry, we're going to get you out." rest of the key. He had designed these escape-proof locks himself. In a few seconds the door swung open and they were fleeing silently down the jail corridor. of himself, the fair-haired boy of Venus Consolidated, in his flapping bathrobe, leading a band of escaping rebels out of the company's best a gasping grunt of pain as one of the rebels went down. They were "We've got to run!" the girl shouted. He started after her. Two surface transport vehicles waited around the corner. Brian and the rebels bundled into them and took away with a the orderly rush of Venus City traffic. The two carloads of rebels cruised nonchalantly past the Administration Center and pulled into a private garage a little beyond. "What are we stopping here for?" Brian demanded. "We've got to get The rebels piled out and the cars pulled away to become innocuous parts of the traffic stream. The rebels seemed to know where they were going "Where the dickens are we?" Brian whispered hoarsely. "Oh, you don't have to whisper, we're safe enough here. This is one of the air shafts leading down to the old mines." "Old mines? What old mines?" area was worked out long before Venus Consolidated came to the planet. level tunnel. "What do we do? Hide here?" will be after us now. We won't be safe anywhere near Venus City." Brian was startled at the icy hardness of her voice. Two of the rebels pulled a screening tarpaulin aside and revealed one of the old-type ore cars that must have been used in the ancient mines. A brand-new atomic motor gleamed incongruously at one end. The rebels crowded into it and they went rumbling swiftly down the echoing rebels had cleared away the debris of years. Brian struggled into a zippered overall suit as they followed a Crystal James, at the controls, seemed to know exactly where they were going. The tunnel emerged in a huge cavern that gloomed darkly away in every direction. The towering, massive remains of old machinery, eroded and rotten with age crouched like ancient, watching skeletons. to be swallowed to a whisper in the vast, echoing darkness. Between two rows of sentinel ruins they came suddenly on two slim Venusian atmospheric ships. Dim light spilled over them from a ragged gash in the wall of the cavern. Brian followed Crystal into the smaller of the two ships and the rest of the rebels manned the other. "Wait a minute, how do we get out of here?" Brian demanded. Crystal looked at him in surprise. "That's nothing. We Venusians fly see. Two big, fast, green ships, carrying the insignia of the Venus Consolidated police, cruised suddenly out from a mountain air station. An aërial torpedo exploded in front of the rebel ship. Crystal's face "You don't have to get excited like that," he complained. "They weren't "But, girl, they're just Venus Consolidated police. They haven't got "Authority doesn't make much difference to them," Crystal snapped think this revolution is about?" The slower rebel freight ship staggered drunkenly as a torpedo caught them. It was over in a few moments. The dead rebels drifted down into outrage. "They didn't have a chance!" valley mists. The heavier police ship, with its higher wing-loading, could not match the maneuver. The rebel craft plunged down through the "Look! Police ships. They've seen us!" She held the ship in its glide, aiming directly for the tangled foliage lush green of the mountainside swirled up to meet them. They ripped through the foliage—there was no crash. They burst through into a huge, brilliantly lighted cavern and settled to a perfect landing. Men "Douse those lights," she shouted. "The police are outside." "Wait, you fool. They may not even have seen us." But he was gone, running toward a group of ships lined up at the end of the cavern. this is our headquarters." One of the ships at the back of the cavern thundered to life, streaked across the floor and burst out through the opening Crystal's ship had left. "He hasn't got a chance! We'll be The other rebels waited uncertainly, but not for long. There was the Brian suggested doubtfully. She looked at him steadily. "You sound like the only good rebel left. We can try it, anyway." They ran two ships out into the middle of the cavern, gunned them around and jockeyed them into position—not a moment too soon. Half a dozen police showed in brief silhouette as they slipped cautiously into the cavern, guns ready, expecting resistance. They met a dead silence. A score or more followed them without any attempt at concealment. Then Brian and Crystal cut loose with the drives of the two ships. Startled screams of agony burst from the crowded group of police as the police, their clothes and flesh scorched and flaming, plunged as "Oh, let them shoot us! I can't go through that again!" adjusted to critical fineness. The beat of the stuttering exhaust in the rock where the police were cutting their way through outside the line of the exhaust flames. The pulsating thunder in the cavern crescendoed to an intolerable pitch. A huge mass of stalactites crashed to the floor. "It's time to check out," Brian shouted. Crystal led the way as they fled down the escape tunnel. The roaring crash of falling rock was a continuous, increasing avalanche of sound in the cavern behind them. They emerged from the tunnel on the face of the mountain, several it stilled and left them bruised and shaken in a tangle of torn vegetation. The remains of two police ships, caught without warning in the rush as vibratory combination, you can shake anything down. But now that we've scrambling through the jungle up the mountainside. "Where are we heading for?" Brian grunted as he struggled along. "The headquarters of the Carlton family. They're the closest people we can depend on. They've kept out of the rebellion, but they're on our

<question>:
What advantage did the rebels have over the Venus Consolidated police?

<options>:
A Fast atmospheric ships
B Detailed knowledge of the area
C Secret supporters on the inside
D Stashes of weaponry in caves

<answer>:

B