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

<passage>:
that was unlike either Earth or the ship, a novel and exhilarating window at the ordered streets of the great Luna Dome. "The Moon.... At last she was on the gangplank, entering the mouth of the spaceship—and nothing could ever stop her now. Not unless she broke down completely in front of all these hurrying, Moon-bound passengers, in plain sight of the scattered crowd which clustered on the other side of the space-field barriers. Even that possibility was denied her interplanetary space, grew hot. She closed them, and for a moment house—the comfort, the safety, the—the it?" He hugged her. After a time he reached down and touched her swelling waist. It was like a benediction. "He'll be born on the Moon," he out to the stars." " She'll be born on the Moon," corrected Marcia, "and her name will be the field, to the laboring beetle of a red tractor bearing the gangway on its busy back, to the low, blast-proof administration building. When Sue, and ... and she'll be almost as good as her father." Marcia, "we won't have to ask the passengers if they're well. It's so huddle, fumbling with the card until it was crammed shapeless into her register for the trip and take the physical for her. She'd had to lie the ship's jets from searing the administration building and the area beyond. Marcia realized with crushing suddenness that the ship was explosion of a Moon-rocket. Rocket motors just don't explode any more, honey! Ships travel to the Moon and back on iron-clad, mathematical orbits that are figured before the ship puffs a jet—" "The Everyone knew about the , the 500-foot Moon-ferry that almost missed the Moon. equations. Too many lobbyists have holdings on the Moon and don't One of the passengers got aboard the Elsinore on somebody else's who never realizes that certain glandular conditions are fatal in free fall." Even now she distinctly recalled the beginnings of the interplanetary reached the free-fall flight, where power could be shut off, the skipper had to put the ferry into an axial spin under power, creating artificial gravity trajectory, and had to warp her in as best he could, without passing the Moon or crashing into it. And of course you're not listening." few weeks. Then, bleakly, she knew she'd go to the ends of Earth for Jack. Or even to the Moon.... Sitting rigid in the tense stillness of a rocket ship that was about to leap from Earth, Marcia started as an officer ducked his head into the passenger compartment from the pilot room's deep glow. But it seats. He ducked back out of sight. From the bulk-heads, the overhead, everywhere, came a deep, quiet rumble. Some of the passengers looked Now the brown-clad Miss Eagen was speaking from the head of the aisle. "Those of you who haven't been in a rocket before won't find it much different from being in an airplane. At the same time—" She paused, quiet brown eyes solemn. "What you are about to experience is something that will make you proud to belong to the human race." That It was snatched away—the buildings, the trees, the roads surrounding Roads dried up like parched rivers, thinning and vanishing into the her down and back Now Earth's surface was vague and Sun-splashed. Marcia's sense of loss if she could push it out, push herself out, go back, back to Earth snowflakes roiling in violet haze. Then, in the purling universe that had grown around the ship, Earth was a mystic circle, a shallow dish floating darkly and heavily below. "We are now," said Miss Eagen's calm voice, "thirty-seven miles over Los Angeles." it lurked nearby, ready to leap. There was the ascent, the quiet, sleeplike ascent into space. Marcia very nearly forgot to breathe. She spellbound, when she realized that she had to finish the job she'd paid more attention to Jack's ramblings about orbits and turn-over the one-and-a-half gravities the ship was holding—and plodded heavily sat for the take-off. the left, where there was a small and compact ship's hospital. "Why, what—is there to be scared of?" "I'm pregnant." "Well, that's no—You're what "Captain McHenry, could you come back to the hospital right away?" "He'll be right here," said Miss Eagen. here , on my ship!" "I'm pregnant, Jack," she said. She put out a hand to ward him off. She couldn't bear the thought of his realizing what she had done while he Softly and slowly he asked, "What in God's name made you get on the . Well, he's my asked it. "Do you work on all these ships at one time or another?" Miss Eagen did not beat around the bush. "I've been with Captain passengers that there won't be any free fall. Most of them are looking bed on the wall?" finished, and the bed hung ludicrously to the wall like a walking fly. "About you and the captain." drawn as Jack had, "I'm supposed to be of service to the passengers at to keep them to myself." "Very courteous, I'm sure. However, I want to release you from your better. In your case...." She sighed. "It's well known—even by you—that the free-fall condition has a weird effect on certain people. The human body is in an swimming. Free-fall means that everything around you is 'up.' The body's reactions to free-fall go much deeper than space-nausea and a in the early stages of pregnancy— always ." through, are much more easily stimulated." "And the only thing that can be done about it is to supply gravity?" "Or centrifugal force (or centripetal, depending on where you're standing, but why be technical?)—or, better yet, keep those people off the ships." with the same force as gravity, and then everything will be all right." "You make it sound so simple." minute he's working over the computer—a small, simple, ship-board computer—working out orbital and positional and blast-intensity data that would be a hard nut for the giant calculators on Earth to crack. And he's doing it in half the time—or less—than it would take the average mathematician, because he has to because it's a life-and-death matter if he makes a mistake or takes too long." "But—but—" exaggerated patience. "That means that the steering jet tubes in the calculated to the last ounce—because enough fuel for a Moon flight, with hours of fuelless free-fall, and enough fuel for a power spin Captain McHenry won't be able to maneuver to a landing on the Moon. the ship's course and landing approach are completely new. Instead of letting the ship fall to the Moon, turning over and approaching tail-first with the main jets as brakes, Captain McHenry is going to He'll come up on the Moon obliquely, pass it, stop the spin, turn over down when the Moon's gravity begins to draw us in. There'll be two "Where are you going?" She found herself at the entrance to the pilot room. In one sweeping Moon's disc. Next to it, and below, was the rear viewer, holding the shimmering azure shape of Earth. " All Earth watches me when I work, but with your eyes. " Elsinore . He's There was a sudden thunder. Over Miss Eagen's shoulder, through the Marcia could never recall the rest of the details of the trip. There was the outboard bulkhead that drew her like a magnet, increasingly, stars, the Moon and Sue Eagen danced and wove. Words slipped in and out fighting—for his ship, for the Moon, for the new-building traditions of the great ones who would carry humanity out to the stars. gunmetal-and-chrome of the ship. White sheets, a new feeling of "down"

<question>:
What was on the Moon that the passengers were travelling to?

<options>:
A A shopping mall
B A space terminal to go to other planets
C An experimental lab
D A colony

<answer>:

D