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

<passage>:
was slow—but it wasn't boring. And it would get you there—as long as the office noticeably, for such of Ganymede's surface as could be seen through the transparent dome outside the office window was cold, dim and rugged. The glowing semi-disk of Jupiter was more than half a million miles distant. orbiting Ganymede! "Try not to be simple—for once!" growled Jeffers. "A little percentage to Earth. The big jets in the home office don't care. They count it on the estimates." here and there on the cargoes never shows by the time figures get back "Now, listen ! Maybe they live soft back on Earth since the mines and the Jovian satellite colonies grew but they were out here in the beginning, most of them. They know what it's like. D'ya think they don't expect us to make what we can on the side?" his body. It had been built for Ganymede, but not for Jeffers. Looks like a little vacation and his gang steal the Great Red Spot off Jupiter if they like! It's by the arbitrary calender constructed to match Ganymede's week-long journey around Jupiter. of one of the airtight tractors used between the dome city and the spaceport, or for hauling cross-country to one of the mining domes. Javelin ." "What's wrong with that?" asked Tolliver. "Outside of the way they keep handing out soft jobs to nephews, I mean." "Aah, these young punks just come out for a few months so they can go back to Earth making noises like spacemen. Sometimes there's no reason but them for sending a ship back with a crew instead of in an economy orbit. Wait till you see the baggage you'll have to load!" Later in the day-period, Tolliver recalled this warning. Under a portable, double-chambered plastic dome blown up outside the ship's airlock, a crewman helped him load two trunks and a collection of bags in stronger gravity than Ganymede's. Her trim coiffure was a shade too blonde which served to set off both the blue of her eyes and the cap or does he just know where bodies are buried? "They were making dates," said the girl. "Were they ribbing me, or is it costs a lot to make the trip. They found they could send back loaded ships by 'automatic' flight—that is, a long, slow, economical orbit and automatic signalling equipment. Then they're boarded approaching Earth's orbit and landed by pilots who don't have to waste their time making the entire trip." maneuvered out of the dome. Then he headed the tractor across the frozen surface of Ganymede toward the permanent domes of the city. "How is it here?" asked the girl. "They told me it's pretty rough." "What did you expect?" asked Tolliver. "Square dances with champagne?" "Don't be silly. Daddy says I'm supposed to learn traffic routing and square inch of Ganymede is likely to be dangerous." "Don't sneer at Ganymede, honey!" he warned portentously. "Many a strike like a vicious animal." "Oh, they told me there was nothing alive on Ganymede!" "I was thinking of the mountain slides," said the pilot. "Not to mention volcanic puffballs that pop out through the frozen crust where you'd least expect. That's why I draw such high pay for driving an unarmored tractor." "You use armored vehicles?" gasped the girl. She was now sitting bolt upright in the swaying seat. Tolliver deliberately dipped one track into an icy hollow. In the light gravity, the tractor responded with a weird, floating lurch. "Those slides," he continued. "Ganymede's only about the size of Mercury, something like 3200 miles in diameter, so things get heaped up at steep angles. When the rock and ice are set to sliding, they come at you practically horizontally. It doesn't need much start, and it barrels on for a long way before there's enough friction to stop it. If you're in the way—well, it's just too bad!" edging the tractor into the airlock at their destination. "Made my pile. No use pushing your luck too far." "It certainly is an honor to have you on Ganymede with us! That's all, he told me to find out what was wrong with operations on Ganymede. trouble to me." be hard to find. Where are your books, Mr. Jeffers? You're as good as fired!" In the gravity of Ganymede, the man was knocked off balance as much as The picture of Jeffers huddled with his partners in the headquarters "What do you think you're up to?" asked Betty with some concern. "This plastic is tough," said Tolliver, "but it will bend with enough heat. If I can kick loose a hinge, maybe we can fool them yet!" for each of the structures in the colony had its own hemispherical emergency dome of transparent plastic. They soon reached the other end. Tolliver. "Why do you want them?" "Honey, I just don't think it will be so easy to lay hands on a Betty how to climb into one, and checked her seals and valves after donning a suit himself. "That switch under your chin," he said, touching helmets so she could hear him. "Leave it turned off. everything !" look their way. Reaching the foot of the main dome over the establishment, he glanced From the corner of his eye, he thought he saw Betty make a startled gesture, but he had his work cut out for him. This was tougher than the interior dome. squeeze. There was room to walk between the inner and outer layer, so he moved along a few yards. A little dust began to blow about where "This time," he said, "the air will really start to blow, so get through as fast as you can. If I can slap this piece of plastic over the rip, it may stow down the loss of pressure enough to give us quite dusty, moist air puffing out into the near-vacuum of Ganymede's against the inside of the dome as if glued, although it immediately showed an alarming tendency to balloon through the ruptured spot. They'll find it, all right when they do! He grabbed Betty by the wrist of her spacesuit and headed for the nearest outcropping of rock. It promptly developed that she had something to learn about running on ice in such low gravity. Until they were out of direct line of sight from the settlement, Tolliver simply dragged her. Then, when he decided that it was safe enough to pause and tell her himself. It was a long mile, even at the pace human muscles could achieve on Ganymede. They took one short rest, during which Tolliver was forced to explain away the dangers of slides and volcanic puffballs. He admitted to having exaggerated slightly. In the end, they reached the There seemed to be no one about. The landing dome had been collapsed spot through the dim light. After a moment, he definitely recognized the outline of a tractor breasting a rise in the ground and tilting downward again. "In fact, we have "Takeoff!" shrilled Betty. "What do you think you're going to do? I just want to use the radio or TV!" could arrange for a cruiser to escort his daughter to Ganymede and send his own little girl way out here to Ganymede to look for whoever firm. If old Koslow had a son to impersonate—" "I'd be stuck for six months in this orbit with some brash young man," meditatively a moment later. "Oh, come on ! Can't they get us back? How can you tell where we're going?" we'll float into the vicinity of Earth at about the right time to be picked up." "I didn't expect to so soon." "Yeah, you were pretty lucky. They'll think you're a marvel to crack the case in about three hours on Ganymede."

<question>:
What is the landscape of Ganymede like?

<options>:
A Steaming hot and rugged
B Riddled with volcanic puffballs
C Frozen, cold, and dim
D Steep mountains of rock and ice

<answer>:

C