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

<passage>:
a second, then vanished with a flaming puff of released gravitons from such a manner that the big, powerful ship was moving at the same rate Unfortunately, other interplanetary moving companies had cashed in on that brainstorm, chiefly the firm of the Saylor brothers—which persons Bob Parker intended to punch in the nose some day. And would have before this if he hadn't been lanky and tall while they were giants. Now that he and Queazy had found the asteroid, they were desperate to get it to its destination, for fear that the Saylor brothers might get wind of what was going on, and try to beat them out of their profits. Which was not so far-fetched, because the firm of Saylor &amp twenty steps away was her small dumbbell-shaped ship, so shiny and heels, "that Bob Parker and company have double-crossed us. We'll have to take steps." The three men behind the Saylor twins broke into rough, chuckling laughter. chance, jerked the spasticizer from the girl's holster and yelled at Queazy. Queazy got the idea, urged his immense body into motion. He hurled straight at Billy Saylor, lifted him straight off the asteroid that somehow Queazy could help, when probably Queazy was in the same condition. He ripped out wild curses directed at the Saylor brothers. Murderers, both of them! Up until this time, he had merely thought of them as business rivals. If he ever got out of this— a ship, shiny and small, driving toward him, growing in size against suddenly brightening face. "Don't thank me," he whispered. "We'd have both been goners if it hadn't been for her. The Saylor brothers left her paralyzed like us, and when she woke up she was on a slow orbit around her ship. and picked out an asteroid that was shaped so a wedding could take by common law.... So I had everything figured out—except," she added bitterly, "the Saylor brothers! I guess Granddad wanted to make sure the asteroid was delivered, so he gave the order to several companies." " Bob groaned. Then he looked at Starre Lowenthal with going to put this to you plainly. We can catch up with the Saylor brothers even if they are three weeks ahead of us. The Saylor ship and ours both travel on the HH drive—inertia-less. But the asteroid has plenty of inertia, and so they'll have to haul it down to Earth by a long, spiraling orbit. We can go direct and probably catch up with them at Bob. "You're plain nuts," he complained. "How do you propose to go about convincing the Saylor brothers they ought to let us have the asteroid back? Remember, commercial ships aren't allowed to carry long-range weapons. And we couldn't ram the Saylor brothers' ship—not Starre. "He's always pulling me up short when I go off half-cocked. All Starre got the idea. She smiled dazzlingly and vanished toward the Bob Parker was in love with Starre Lowenthal. He knew that after five attach any significance to Starre's dumbbell-shaped ship, which trailed Starre apparently knew he was in love with her, too, for on the fifth "Right," he said unsteadily. "Anyway, Starre, as I was saying, this ship operates according to the reverse Fitzgerald Contraction Formula. shake. He took her hand. "Starre," he said desperately, "I've got to "There's your ship, Starre." He jabbed his finger at it. "I've got a Starre's blue eyes followed the long cable back to where it was attached around her ship's narrow midsection. She shook her head helplessly. "It just looks like a big yo-yo to me." "A yo-yo?" "Yes, a yo-yo. That's all." She was belligerent. "A yo-yo !" Bob Parker yelled the word and almost hit the ceiling, he got out of the chair so fast. "Can you imagine it! A yo-yo!" fastening two huge supra-steel "eyes" onto the dumbbell-shaped ship's The nose of the hauler was blunt, perfectly fitted for the job. Bob Parker practiced and experimented for three hours with this yo-yo of cosmic dimensions, while Starre and Queazy stood over him bursting into strange, delighted squeals of laughter whenever the yo-yo reached the "It'll work!" His gray eyes showed satisfaction. "Now, if only the Saylor brothers are where we calculated!" They weren't where Bob and Queazy had calculated, as they had discovered the next day. They had expected to pick up the asteroid Moon's orbit. But now they saw the giant ship attached like a leech to spread out, a huge crescent shape, part of the Eastern hemisphere Bob nodded grimly. He backed the hauler up about thirty miles, then sent it forward again, directly toward the Saylor brothers' ship at ten miles per second. And resting on the blunt nose of the ship was the "yo-yo." There was little doubt the Saylors' saw their approach. But, scornfully, they made no attempt to evade. There was no possible harm Bob sweated, having only fractions of seconds in which to maneuver for the "yo-yo" could strike a fatal blow at the hauler too. It was ticklish work completely to nullify the "yo-yo's" speed. Bob used exactly the same method of catching the "yo-yo" on the blunt nose of the ship as a baseball player uses to catch a hard-driven ball in his glove—namely, by matching the ball's speed and direction almost exactly at the moment of impact. And now Bob's hours of practice paid dividends, for the "yo-yo" came to rest snugly, ready to be released again. All this had happened in such a short space of time that the Saylor brothers must have had only a bare realization of what was going on. But by the time the "yo-yo" was flung at them again, this time with better calculations, they managed to put the firmly held asteroid between them and the deadly missile. But it was clumsy evasion, for the asteroid was several times as massive as the ship which was towing it, and its inertia was great. And as soon as the little ship came spinning back to rest, Bob flung the hauler to a new vantage point and again the "yo-yo" snapped out. And this time—collision! Bob yelled as he saw the stern section of the Saylor brothers' ship crumple like tissue paper crushed between the hand. The dumbbell-shaped ship, smaller, and therefore stauncher due to the principle of the arch, wound up again, wobbling a little. It had Starre was chortling with glee. Queazy whispered, "Attaboy, Bob! This time we'll knock 'em out of the sky!" The "yo-yo" came to rest and at the same moment a gong rang excitedly. Bob knew what that meant. The Saylor brothers were trying to establish communication. He snapped the hauler into its mile-a-second speed again, stopped it at zero. And the "yo-yo" went on its lone, destructive sortie. For a fraction of a second Wally Saylor exhibited the countenance of a doomed man. In the telaudio plate, he whirled, and diminished in size with a strangled yell. The "yo-yo" struck again, but Bob Parker maneuvered its speed in such a manner that it struck in the same place as before, but not as heavily, then rebounded and came spinning back with perfect, sparkling precision. And even before it snugged itself into its berth, it was apparent that the Saylor brothers had given up. Like a wounded terrier, their ship shook itself free of the asteroid, hung in black space for

<question>:
How does the shape of Starre's ship benefit them?

<options>:
A It made it easy to spot and to re-locate it.
B It's small, making it easy for them to transport it with them.
C Being a "yo-yo" shape, it was easy to attach cables to it and maneuver it back and forth.
D Being a "yo-yo" shape, they can use it like one to fight against the Saylor brothers.

<answer>:

D