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

<passage>:
did the heavenly bodies of this strange space. It was pure conjecture, but it seemed well supported by the observable A bunch of kids in bright new uniforms, transiting the constellations in a disreputable facts. The hull continued to glow with its unnatural witchfire, and old bucket of a space-shipâ€”why should the leathery-tentacled, chlorine-breathing By ALFRED COPPEL, JR. Planet Stories Summer 1949. Extensive research did not uncover any evidence that from the ship herself radiation's source was the glow that clung stubbornly to the spacer's A tense week passed and then the ship neared the spot where a calculations, 40 Eridani C would be within 40,000,000 miles of them when the ship emerged from hyper space. And then the Radar section picked up the planetoids. Millions of them, large and small, lay in a globular cluster dead ahead. They spread out in all directions for more than half a parsec ... dull, rocky little worlds without a gram of detectable mass. All that waited for the Cleopatra in her own cosmos was a hot reception at the hands of the defenders of 40 Eridani C II, while here was mystery at close range. Mystery that was not cosmic in scope ... just a swarm of innocuous seeming planetoids ... the first explorable worlds that they had neared in this universe. Strike decided to heave with the rapacious Eridans. With typically human adaptiveness they had sublimated their fear of the unknown space in which they found Ship Cleopatra in the Combined Solarian Navies, bless her little iron rump! Gorman means us. And I think we've been had, that's what I think!" "Warp!" An imported Venusian quartet began to play softly. Strike ordered another round of drinks from the red-skinned Martian tending bar and they had worked together to pull Admiral Gorman's flagship Atropos Fleet skeeterboats had discovered a race of group-minded, non-human Only CSN Intelligence knew that the Eridans were warlike ... and that they were strongly suspected of having interstellar flight.... So, reflected Strike, the transfer of the Cleopatra warship. The wasted in nauseous free-fall. Lover-Girl wormed her way through the asteroid belt, passed within a million miles of Jupiter and settled comfortably down on the airless field next to the glass-steel dome of the Experimental Substation on begun. Swarms of techmen seemed to burst from the dome and take her over. Welders and physicists, naval architects and shipfitters, all armed with voluminous blueprints and atomic torches set to work on companionways, bawling incomprehensible orders. And her crew watched in "Well, I'll make it short," Ivy said. "We're going to make a hyper-ship "Hyper-ship?" Cob was perplexed. Ivy Hendricks nodded. "We've stumbled on a laboratory effect that warps space. We plan to reproduce it in portable form on the star-fields ... star-fields that were utterly different and ... and alien . It seems that there's at least one other space interlocked and co-existent with ours. When we realized that we decided to send a ship through. I sent a UV teletype to Admiral Gorman at Luna Base ... and smile. "Besides, I wouldn't want to enter an alien cosmos with anyone "Golly!" said Celia Graham again. "Alien cosmos ... it sounds so creepy solar Combine! All the colonies in Centaurus are being invaded!" Strike felt the bottom dropping out of his stomach, and he knew that all the others felt the same. If this was a war, they were the ones that my ship is fueled and armed for space within three hours!" hyper-ship that was still Old Aphrodisiac lifted from the ramp outside An hour after blasting free of Tethys was pointed at the snaking river of stars below Orion that formed the constellation of Eridanus. When Cob asked why, Strike replied that knowing Gorman, they could expect orders from Luna Base ordering them either to attack or reconnoiter the 40 Eridani C system of five planets. Strykalski added rather dryly that it was likely to be the former, since Space Admiral Gorman had no great affection for either the Cleopatra Cleopatra rode the curvature of space toward Eridanus. At eight and a half light years from Sol, the second-order was cut so that Bayne could get a star sight. As the lights of the celestial globe slowly retreated from their unnatural grouping ahead and astern, brilliant Sirius and its dwarf companion showed definite disks in the starboard ports. At a distance of 90,000,000 miles from the Dog Star, its fourteen heavy-gravity planets were plainly visible through the electron telescope. Strykalski and Ivy Hendricks stood beside Bayne in the dorsal blister while the astrogator sighted Altair through his polytant. His long, horse face bore a look of complete self-approbation when he had "No, sir. The density index indicates spacecraft. High value in the ready to fight his ship if need be ... and against lop-sided odds. But years of training were guiding him now. vanished, only to reappear in distorted groups ahead and behind the ship. They were in second-order flight again, and traveling above light the alien fleet. horde. Within the black hulls strange, tentacled creatures watched atmosphere grew tense as the Tellurian warship drove full at the spaceships. The soft quivering bulk of it throbbed with excitement as The alien weapons were too strange, too different from anything her mentality that rested secure on its home world, the Eridans lacked the space and leathery aliens died, their black ships burst asunder by the "The hyper drive!" she yelled, "The hyper drive!" She struggled out of the flying bridge and down the ramp toward the A movement of the ship threw him to the deck. He struggled to his hyper drive's warp field. With a prayer on his lips, he slapped at the port and looked out. No alien ships filled the void with crisscrossing was alone, floating in star-flecked emptiness. There were no familiar constellations. The stars were spread evenly across the ebony bowl of the sky, and they looked back at him with an alien, icy disdain. He was conscious of Cob standing beside him, looking out into this unknown universe and whispering in awe: " We're the aliens here...." eyes. "I came up through the ventral blister," she said, "Bayne is down there and he's having fits. There isn't a star in sight he recognizes and the whole hull of the ship is glowing !" Cob and Strykalski rushed back to the port, straining to see the space ... and the danger of the questing Eridans ... that kept one or people, parts of an intricately technological culture. Their ship were in an unknown cosmos. Damage Control was something he knew and gyro-headings." "What?" The astrogator sounded as though he thought Strike had lost his alien space toward the spot where 40 Eridani C existed on the other side of the barrier. The ship's tactical astrophysicist brought in some disturbing reports on the stars that shone brightly all around her. They fitted the accepted classifications in all particulars ... except one. And that one had the scientist tearing his hair. The mass of every observable body except the ship herself was practically non-existent. Even the two planetary systems discovered by the electron telescope flouted their impossible lack of mass. Ivy suggested that since the Cleopatra and her crew were no part of this alien cosmos, no prime-space instruments could detect the errant warship existed under a completely different set of physical laws than

<question>:
How was the ship able to navigate through the alien cosmos?

<options>:
A They were able to calculate the route
B They were already in route to Eridanus
C They were able to sight alien stars
D They discovered two planetary systems by telescope

<answer>:

A