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

<passage>:
Planet of No-Return By WILBUR S. PEACOCK The orders were explicit: "Destroy the 'THING' of Venus." But Patrolmen Kerry Blane and Splinter Wood, their space-ship wrecked, could not follow orders—their and I don't like this ship and I don't like the assignment and I don't like those infernal pills "You're a squirt!" he snapped disagreeably. "You're not dry behind the ears, yet. You're like the rest of these kids who call themselves "Mister Wood," he said icily, "I was flying a space ship while they to fly a ship, how to cure space bends, how to handle a Zelta ray, or how to spit—I'll ask you! Until then, you and your bloody marbles can pocket, grinned mockingly. "But don't say I didn't warn you. With this shielded ship, and with no sunlight reaching Venus' surface, you're gonna be begging for some of my vitamin, super-concentrated pills before we get back to Earth." Kerry Blane had flown every type of ship that rode in space. In the had flown them with increasing skill, had earned a reputation as a a rusty old freighter couched between the gleaming bodies of great space warriors. Finally, as a last resort so that he would not be thrown entirely Interplanetary Squadron because of his inherent skill, even though his formal education had been fairly well neglected. Now, the two of them rode the pounding jets of a DX cruiser, bound for Venus to make a personal survey of its floating islands for the Interplanetary Squadron's Medical Division. loosened collar. "Of course!" Splinter grinned. control-room of the cruiser. was a surging stream that pounded at his throbbing temples. The air he breathed seemed to be molten flame. His body arced again and again against the restraining straps, and his His long hands played over the instrument panel, checking, controlling the rocket fire, adjusting delicate instruments to hairline marks. Kerry Blane nodded in silent approval. They could feel the first tug of gravity on their bodies, and through Venus. Excitement lifted their spirits, brought light to their eyes as Venus is a tricky place to set a ship on." water planet, wondering—wondering— Venus was a fluffy cotton ball hanging motionless in bottomless space. Far to the left, Mercury gleamed like a polished diamond in sink into a fast gravity-dive, guiding it only now and then by a brief and twisted uneasily over the surface of the planet. tug at his heart when he remembered the first time he had approached the water-planet years before. Then, he had been a young and reckless firebrand, his fame already spreading, an unquenchable fire of Now, his aged but steady fingers rested lightly on the controls, brought the patrol cruiser closer to the cloud-banks on the line of demarcation between the sunward and sunless sides of the planet. He hummed tunelessly, strangely happy, as he peered ahead. destroy the thing that killed him." His lean fingers tightened unconsciously. "I'd like nothing better than to turn a Zelta-blaster on that chunk of living protoplasm and cremate it." the nose rocket dropped the ship in an angling glide toward the clouds a few miles below. Gravity was full strength now, and although not as great as Earth's, was still strong enough to bring a sense of giddiness to the men. "Here we go!" Splinter said tonelessly. The great cottony batts of roiling clouds rushed up to meet the ship, bringing the first sense of violent movement in more than a week of flying. There was something awesome and breath-taking in the speed with which the ship dropped toward the planet. Tendrils of vapor touched the ports, were whipped aside, then were replaced by heavier fingers of cloud. Kerry Blane pressed a firing the outer air, then dissipated, as the force-screen voltometer leaped higher. through sheer instinctive ability, seeming to fly it as though he were an integral part of the ship. and still the clouds pressed with a visible strength against the ports. The rockets drummed steadily, holding the ship aloft, dropping there is no light on Venus," he exclaimed. "That was one of the reasons spacemen from losing their lives on the planet. In reality, the reflected back from the clouds, makes Venus eternally lighted." felt tired and worn, his body aching from the space bends of a few hours before. "Take over," he said wearily. "Take the ship North, and watch for any turtle-island, make a landing, and take a look around. Later, if we're He swung the cruiser in a wide arc to the north, trebling the flying speed within minutes, handling the controls with a familiar dexterity. He said nothing, searched the gleaming ocean for the smudge of to occupy your time shortly." Kerry Blane rode the controls for the next three hours, searching the his head, his fingers flickering over the control studs. "Don't get your hopes too high, lad," he counseled. "With those super circus. "Listen, for ten minutes of that, I'd ride this chunk of metal for a year!" "Could be!" Kerry Blane agreed. He peered through the port, seeking any spot clear enough for a landing field. Except for a strip of open beach, the island was a solid mass of heavy fern-like growth. "Belt yourself," Kerry Blane warned. "If that beach isn't solid, I'll have to lift the ship in a hell of a hurry." "Right!" Splinter's fingers were all thumbs in his excitement. cruiser hurtled toward the beach like a gravity-crazed comet. plowed into the silvery sand. Belts parted like rotten string they were thrown forward with crushing force against the control panel. They groped feebly for support, their bodies twisting involuntarily, as the ship cartwheeled a dozen times in be rewired, but nothing else seems to be damaged so that repairs are needed." "One of them broke and shorted out the control board." He scowled at the incredulous Splinter. "By the three tails of a Martian sand-pup, I ought to cram the rest of them down your throat, boxes and all!" "Forget it, lad," he said more kindly, "those things happen. Now, if you'll bind a splint about my arm, we'll see what we can do about righting the ship." "Let's take a look outside, maybe set up the Zelta guns. Can't tell but what that protoplasmic nightmare might take a notion to pay us a visit in the near future!" clamber through the port. They stood for a moment in silent wonder, furrow plowed in the sand. "Won't be any trouble at all to lift the ship," he called. "After rewiring the board, we'll turn the ship with an underjet, swing it about, and head her toward the sea." a rope ladder outside, where it dangled to the ground, then climbed out himself, carrying the two Zelta guns. "We'd better test these," he said. "We don't want any slip-ups when we do go into action." strong in the lesser gravity. He stood, leaning against the ship, watching as Splinter picked up Splinter shook his head. "There's only one moving part," he said, "and that's the force gate on the firing stud." "Try the other," Kerry Blane said slowly. "Okay!" his companion. "It won't work, either," he said stupidly. "I don't get it? The source of power is limitless. Solar rays never—" "Damn it," he said. "They didn't think of it you didn't think of it and I most certainly forgot! Solar rays can't penetrate the miles of clouds on Venus. Those guns are utterly useless as weapons!"

<question>:
How do the space travellers navigate around the planet of Venus?

<options>:
A Only by sight
B Radar
C Using a search and rescue flight pattern
D Using magnetic poles

<answer>:

A