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

<passage>:
I learned to spot a passable crack, and tell it from an impassable cut. Time after time the Bugs ground to JAMES BARON was not pleased to hear that he had had light copper cable, digging, advancing, digging some more until we were sure the surface would carry the machines. It was cruel work had no stomach for mysteries, vast or trifling, and there pardons, Mr. Baron. The gentleman—he would leave no Too smoothly, it seemed to me, and the others seemed to think so, too. Now Baron drummed his fingers on the table top, staring at first. 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 enough myself waited impatiently for the intruder who demanded his time down at Baron’s table. He was short and wiry. His face held he looked weary and immensely ugly. His cheeks and penultimate blow to our already fraying nerves. He had driven a halt while we explored a passage on foot, tied together with The grizzled man searched Baron’s face for a moment “Say, who are you, if you don’t mind?” Baron demanded. and, for once, he didn’t have anything to say. It was the wreck of a Bug an old-fashioned half-track model of the sort that hadn’t been in use for years. It was wedged tight in a cut in the rock, an axle broken, its casing split wide open up the Baron’s eyes were wide with excitement, all trace of anger middle, half-buried in a rock slide. A dozen feet away were their “Quit looking!” Baron bent forward over the table. “My felt different. On two occasions I felt my wheels spin, with a howl of protest 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 story you cleared for the news—it was nothing. We need details . 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 it across where your attempt failed—” “You want to know why we failed?” asked Claney. “Of course we want to know. We I caught myself wishing that the Major had okayed “It’s simple. We failed because it can’t be done. We couldn’t One error in judgment could sink us all, but I wasn’t thinking have “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 both quarters—but we just didn’t know what we were fighting. It was the planet that whipped us, that and the Sun much about the others. I was worried about me “Never,” said Baron. I let out a shout to halt the others Wyatt and Carpenter made the last attempt—that was in 2082, I think. I followed the news stories like a tri-V serial and then I was heartbroken when they just disappeared. I know now that they were a pair of idiots, starting off without proper equipment, with practically no knowledge of surface conditions, without any charts—they couldn’t have made a hundred miles—but I didn’t know that then and it was a for some years and hung onto the title after he gave up since the Matto Grasso. Then he made the attempt on Vulcan place. Too many men in this game are all nerve and luck, and how he preferred a hot trek to a cold one any day of the “No particular plans,” I told him. “Why?” He threw his head back. “Why try a Crossing at aphelion? I’d thought of it a thousand times and never dared consider It would be a hellish trek. Only a few men had ever learned how hellish and they never came back to tell about it. It The Major was counting on Sanderson knowing something Poor Jack met us at the rocket landing almost bawling, Sanderson this trek. I had a funny feeling that Jack really didn’t care for exploring too much, but he thought Mikuta was God, followed liable to get awfully uneasy and none of them can equipment all lined up when we got there, ready to check and test. equipment was new and good. Mikuta had done the designing and testing himself, with a big assist from Sanderson. We had four Bugs, three of them the light pillow-tire models, with special lead-cooled cut-in engines when the heat set in, The Major went over them like a kid at the circus. Then he The Major laughed. “I don’t think we need to worry about The Major shrugged. “Well, it’s treacherous, there’s no Pole, which would lose us days and offer us no guarantee of It seemed that the more we considered the problem, the 2 , and nitrogen, and traces of that avoided those upheavals as far as possible. But in the final analysis, we were barely scraping the surface. The only way we would find out what was happening where was to be there. Finally, on the third day, McIvers blew in on a freight in hopes of getting a hop from there. He didn’t seem too upset he couldn’t see why everyone should get so excited. Evidently the Major decided not to press the issue of his “And that,” said Baron, finishing his drink and signaling the waiter for another pair, “was your first big mistake.” like this, and some of the best wouldn’t seem to be the most reliable at first glance. Anyway, personality problems weren’t our big problem right then. Equipment worried us first and route Baron nodded in agreement. “What kind of suits did you we had a half-inch dead-air space under positive pressure between the two layers. Warning thermocouples, of course—at 770 degrees, it wouldn’t take much time to fry us to cinders if the suits failed somewhere.” “How about the Bugs?” “They were insulated, too, but we weren’t counting on them too much for protection.” “You weren’t!” Baron exclaimed. “Why not?” and storage, but we knew we’d have to do a lot of forward work on foot.” Claney smiled bitterly. “Which meant that we had an inch of fiberglass and a half-inch of dead air Baron licked his lips. His fingers stroked the cool, wet glass to know.” what terrain we had to cross. Detours would be dangerous and time-consuming. Delays could cost us our lives. We all knew that. the individual, maybe, but I was driving blind now and I didn’t like it. to the frame and wheels.” McIvers shook his head. “No, I mean the advance work. We don’t need to 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 “No dice,” the Major broke in. “But why not? We could save ourselves days!” 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 some nerve pathways got twisted up, somehow. We poured sweat as if we were in a superheated furnace. The Major measured water out with an iron hand, because we’d have drunk ourselves into nephritis in a week otherwise. We were constantly, unceasingly thirsty. Ask the physiologists reasons—but all we knew, or cared about, was that it happened to be so. We didn’t sleep the first few stops, as a consequence. Our eyes burned in spite of the filters and we had roaring headaches, the challenge was so powerful you could almost feel it. No one Yet we knew that even the land might have been conquered their

<question>:
What doesn't Baron think was a reason for their failure?

<options>:
A McIvers
B the Major's experience
C poor mapping
D faulty equipment

<answer>:

B