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

<passage>:
They were still separated, two on one side of the airlock, two on the other. melting, yes. Melting down at the bottom a little. Now it's falling over to one side and laying on the air tank. The air tank is getting red, too. I'm afraid ... it's weakening it.... Redder. Oh, oh." Next morning, before the sunlight exploded, the four of them donned their space suits and went and sat outside the dome, waiting. The sun rose with its bright, silent clap of radiance. Black pools of shadows lashed through the airlock and rolled across the lunar surface. The Progress. When—boom?" "Boom! Boom!" said Major Winship in exasperation. emergency watch this morning," he explained to the other Americans. "The one that doesn't speak English." Americans. "How are we going to know when it's over?" no more. "Static?" "Nope." "We'll get static on these things." Major Winship shifted restlessly. "My reefer's gone on the fritz." "Let's all go in," said the fourth American, Capt. Lawler. "It's "The static level hasn't gone up much, if at all." "Maybe," Lt. Chandler said, "it's buried too deep." "Maybe so," Major Winship said. "But we can't have the dome fall down around all our ears." He stood. "Whew! You guys stay put." He crossed with the floating moon-motion to the airlock and entered, "It's—" Americans: "Our comrades seem unconcerned." "I guess I was just—" Major Winship began. "Oh, hell! We're losing pressure. Where's the markers?" "Got 'em," Major Winship said a moment later. He peeled back a marker and let it fall. Air currents whisked it away and plastered it against a riveted seam of the dome. It pulsed as though it were breathing and then it ruptured. Major Winship moved quickly to cut out the emergency air supply which on your right side, midway up. I'll try to sheet it." He moved for the plastic sheeting. "We've lost about three feet of calk out here," Capt. Lawler said. "I can see more ripping loose. You're losing pressure fast at this rate." Major Winship pressed the sheeting over the leak. "How's that?" "Not yet." "I don't think I've got enough pressure left to hold it, now. It's sprung a little, and I can't get it to conform over the rivet heads." There was a splatter of static. "Damn!" Major Winship said, "they should have made these things more flexible." "Still coming out." seismic data out of that shot.... Well, to hell with them, let's get this leak fixed. Skip, can you get the calking compound?" "Larry, where's the inventory?" "Les has got it." energized the circuits. There was a puzzled look on his face. He leaned his helmet against the speaker and then shook his head sadly. "We can't hear anything without any air." "How does this stuff work?" Capt. Lawler asked. "Let's see. Squeeze the tube until the diaphragm at the nozzle ruptures. Extrude paste into seam. Allow to harden one hour before service." Major Winship said dryly, "Never mind. I notice it hardens on contact "How do they possibly think—?" "Who was supposed to check?" demanded Capt. Wilkins in exasperation. "The only way you can check is to extrude it," Lt. Chandler said, "and if it does extrude, you've ruined it." "That's that," Major Winship said. "There's nothing for it but to yell help." something else goes wrong." cursed twice during the operation. "I'd hate to live in this thing for any period." Capt. Wilkins raised eyebrows. "What brought this on?" "I was just thinking.... They really got it made, Larry. They've got better than three thousand square feet in the main dome and better than twelve hundred square feet in each of the two little ones. And there's equipment around until the emergency jacks were accessible. He unearthed the appropriate cable and began unscrewing the exterior "What's wrong?" came the worried question. In the background, he heard Air, Major Winship said silently. Leak? stresses in the long undisturbed satellite, and was done in the face of vigorous American protests." The turn was uncomfortably tight and complicated by the restraining cables. Capt. Wilkins began replacement of the air bottle. "These protests have proved well founded," Major Winship continued. withstand a moderately severe shifting of the Lunar surface. No personnel were injured and there was no equipment damage." being inserted. Another tap indicated it was seated. Major Winship flicked the appropriate chest button and nodded in appreciation. "However," he continued, "we did experience a minor leak in the dome, which is presently being repaired." "The Soviet Union," came the reply, "has reported the disturbance and has tendered their official apology. You want it?" "It can wait until later. Send it by mail for all I care. Vacuum has destroyed our organic air reconditioner. We have approximately three weeks of emergency air. However, Base Gagarin reports no damage, so that, in the event we exhaust our air, we will be able to obtain the necessary replacement." be able to deliver replacements in about ten days." "I will forward a coded report on the occurrence," Major Winship said. "Let us hear from you again in ... about three hours. Is the leak repaired?" "The leak has not yet been repaired. Over and out." He nodded to Capt. Wilkins and leaned back. Methodically, Capt. Wilkins set about disconnecting the major from the The airlock to Freedom 19 was open. "What is "It's this way," Lt. Chandler said. "They didn't have anything but "Now," Major Winship said, "we can either bring the drum inside or take "We're going to have to bring the drum in," Capt. Wilkins said. It took the four of them to roll the drum inside, rocking it back and forth through the airlock. At that time, it was apparent the table was interposing itself. Lt. Chandler tried to dismantle the table. "Damn these suits," he said. "You've got it stuck between the bunk post." "The hell it isn't the weight," said Lt. Chandler. "That's heavy." "With my reefer out," said Major Winship, "I'm the one it's rough on." He shook perspiration out of his eyes. "They should figure a way to get a mop in here, or a towel, or a sponge, or something. I'll bet you've forgotten how much sweat stings in the eyes." "No!" Major Winship snapped. With the drum of calking compound inside, both Capt. Lawler and Lt. "Now what, Skip? The instructions aren't in English." thoroughly around the leak." "With what?" asked Major Winship. "Sandpaper, I guess." the drum. "We don't have any sandpaper." plastic." "Let's come back to how we're going to clean around the leak," Major Winship said. "Out! Out!" He and the Major reached the airlock at the same time and became in the space suits under the best of conditions, and now, with the necessity for speed, was doubly so. The other two crashed into them from behind, and they spewed forth from the dome in a tangle of arms and legs. At the table, they separated, two going to the left, two to the right. like shrapnel." They obeyed. "What—what—what?" Capt. Lawler stuttered.

<question>:
What is the new problem the American astronauts are left with at the end of the passage?

<options>:
A The dome has no been compromised.
B The barrel has destroyed their air supply.
C The calking compound has hardened and become unusable.
D They can no longer fix the leek in the dome.

<answer>:

B