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

<passage>:
sag of the dust JAMES BARON was not pleased to hear that he had had pardons, Mr. Baron. The gentleman—he would leave no Too smoothly, it seemed to me, and the others seemed to Now Baron drummed his fingers on the table top, staring He talked too much, while we were resting or while we were McIvers’ restlessness was beginning to grate on our nerves. wisecracks, witticisms, unfunny jokes that wore thin number. Across to the right was a group that Baron knew I figured that it would pass off after a while. I was apprehensive down at Baron’s table. He was short and wiry. His face held no key to his age—he might have been thirty or a thousand—but he looked weary and immensely ugly. His cheeks and forehead were twisted and brown, with scars that were still healing. filters we would have been blinded constantly and the skin on our faces itched and tingled at the as it was our eyes ached heard a sharp cry through our earphones. The grizzled man searched Baron’s face for a moment not going to make the Crossing.” “Say, who are you, if you don’t mind?” Baron demanded. “The name is Claney,” said the stranger. There was a silence. Then: “Claney? of a Bug Claney?” “That’s right.” Baron’s eyes were wide with excitement, all trace of anger Peter and, for once, he didn’t have anything to say. It was the wreck middle, half-buried in a rock slide. A dozen feet away were two insulated suits with white bones gleaming through the whole idea.” “Quit looking!” Baron bent forward over the table. “My hadn’t been in use for years. It was wedged tight in a cut in It looked the same, but every now and then it the rock, an axle broken, its casing split wide open up the Peter Claney shook his head. “I can’t tell you anything you from my engine. Then, quite suddenly, the Bug gave a lurch I gunned my motor and nothing happened. I could see the dull gray stuff seeping up around the hubs, thick and tenacious, splattering around in steaming gobs as the wheels spun. I knew what had happened the moment the . Where did your equipment fall down? Where did you miscalculate? What were the trouble spots?” Baron jabbed a finger at Claney’s face. “That, for instance—epithelioma? Why? What was wrong with your glass? Your filters? We’ve got to know those things. If you can tell us, we can make all the world like thick gray mud, but it was a pit of molten “You want to know why we failed?” asked Claney. I caught myself wishing that the Major had okayed lead, steaming under a soft layer of concealing ash. it across where your attempt failed—” One error in judgment could sink us all, but I wasn’t thinking the Brightside alive, not if they try for centuries.” “Nonsense,” Baron declared. “We will.” Claney shrugged. “I was there. I know what I’m saying. You can blame the equipment or the men—there were flaws in worried. I kept thinking, better McIvers should go than me. It was the both quarters—but we just didn’t know what we were fighting. that whipped us, that and the “Never,” said Baron. “Let me tell you,” Peter Claney said. then I edged my Bug I know now that they were a pair of idiots, starting off without He threw his head back. “Why try a Crossing at aphelion? drum you out of the glory by crossing at perihelion forty-four days later? No, thanks. I want the Brightside without any nonsense Mercury. I want Mercury—but I’ll need help getting it.” it. Nobody had, since Wyatt and Carpenter disappeared. Mercury how crew sunk deep into the crust, and the tower that housed the Solar ’scope that Sanderson had built up there ten years before. exploring too much, but he thought Mikuta was God, followed liable to get awfully uneasy and none of them can The Major went over them like a kid at the circus. Then he trip to him and we’re going to need each other too much to Pole, which would lose us days and offer us no guarantee of It seemed that the more we considered the problem, the condensed, carrying enough volcanic ash with it for Sanderson to estimate the depth and nature of the surface upheavals on Finally, on the third day, McIvers blew in on a freight he couldn’t see why everyone should get so excited. He was a tall, rangy man with long, wavy hair prematurely Evidently the Major decided not to press the issue of his Stone and McIvers were thick as thieves, and everything was “And that,” said Baron, finishing his drink and signaling Peter Claney raised his eyebrows. “McIvers?” “Of course.” Claney shrugged, glanced at the small quiet tables around them. “There are lots of bizarre personalities around a place like this, and some of the best wouldn’t seem to be the most reliable at first glance. Anyway, personality problems weren’t worried us first and Baron nodded in agreement. “What kind of suits did you have?” “The best insulating suits ever made,” said Claney. “Each one had an inner lining of a fiberglass modification, to avoid the clumsiness of asbestos, and carried the refrigerating unit and oxygen storage which we recharged from the sledges every eight hours. Outer layer carried a monomolecular chrome reflecting the two layers. Warning thermocouples, of course—at if the suits failed somewhere.” “How about the Bugs?” them too much for protection.” “You weren’t!” Baron exclaimed. “Why not?” tractor and dragged me back out of the mire. It looked for Baron licked his lips. His fingers stroked the cool, wet glass approach to the Sun—which made Center the hottest part of the planet at the hottest it ever gets. The Sun was already huge and yellow over the horizon worry about the major topography. It’s the little faults you can’t see on the pictures that can kill us.” He tossed the charts area closely and radio back to Peter where to avoid the flaws. “But why not? We could save ourselves days!” back over my shoulder, I could see the Major and McIvers crawling out behind me, their pillow tires Even at only 30 per cent Earth gravity they were a strain on the big tractor, until the ski-blades bit into the fluffy volcanic ash blanketing the valley. We even had a path to follow for the first twenty miles. I kept my eyes pasted to the big polaroid binocs, picking out sweat as if we were in a superheated furnace. came due, we pulled the Bugs together into a square, threw up The Major measured water out with an iron hand, because we’d have drunk ourselves into nephritis in a week otherwise. eyes burned in spite of the filters and we had roaring headaches, the wheel. We were moving down into desolation that made Earth’s old Death Valley look like a Japanese rose garden. Huge sun-baked cracks opened up in the floor of the gorge, with black cliffs jutting up on either side Yet we knew that even the land might have been conquered on Mercury forty years before, but beyond it there were active cones. Yellow fumes rose from the craters constantly their sides were shrouded with heavy ash. sulfurous breeze sweeping in great continental tides across the face of the planet. Not enough for erosion, though. The craters rose up out of jagged gorges, huge towering spears of rock and rubble. Below were the vast yellow flatlands, smoking and hissing ash, filling crevices and declivities—offering a soft, treacherous surface for the Bug’s pillow tires.

<question>:
Why does Baron think there was something wrong with Claney's filters?

<options>:
A Claney's face is extremely sunburned.
B Claney's face is twisted and brown.
C Claney's face is covered in scars.
D Claney's face is covered in cancerous tumors.

<answer>:

D