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

<passage>:
SILENCE IS—DEADLY By Bertrand L. Shurtleff Radio is an absolute necessity in modern organization—and particularly in modern naval organization. If you could silence all radio—silence of that sort would be deadly! still some unconscious men to be revived. In a sheltered cove among [Transcriber's Note: This etext was produced from the rocks, an exploring group had found enough dry driftwood to make a fire— the scene with a ghostly radiance. The men of the Astounding Science-Fiction April 1942. Extensive research did not uncover any evidence that driftwood bonfires in the cove. When this was completed, it was found that the the cabin with him—Zukor Androka, the elderly Czech scientist, a guest With the coming of dawn, a little exploration revealed that the Comerford's crew was marooned on an islet, about a square mile in area that they had been put ashore without food or extra clothing or equipment of any kind, and that no boats had been left for them. One searching party reported finding the remains of what had been a radio station on a high promontory on the north shore of the islet. Another had found the remains of tents and log cabins, recently demolished, in a small, timbered hollow—a well-hidden spot invisible from the air, unless one were flying very low a place where two daily in the room in the superstructure that had been assigned as his There was a good water supply—a small creek fed by springs—but nothing in the way of food. Evidently food was a precious commodity which the recent inhabitants of the islet couldn't afford to leave behind. Curtis was studying the wreckage of the wireless station, wondering if this might have been the source of Androka's zone of silence, when hundred or more men could have camped. Ensign Jack Dillon came up to him. of good-natured joking aboard the if from unestimated currents among the islets. No chance to check by the rack. underlined heavily. declared, frowning at the two papers and hastily rechecking his own figures. "Call up to the bridge to stop her," he told Nelson. "We can't afford at once. Nelson said: "I've been wondering, sir, if it wouldn't be advisable to try getting a radio cross-bearing. With all these rocks and islets—" "Radio?" repeated the little Czech, thrusting his face between the other two, in his independent fashion that ignored ship's discipline. old eyes twinkling behind their thick lenses. "Go ahead and try it. See how much you can get! It will be no more than Hitler can get when Zukor Androka decrees silence over the German airways! Try it! Try it, I say!" Bob Curtis stared at him, as if questioning his sanity. Then he hastened to the radio room, with Nelson at his heels, and the Czech that had recently been established to insure safety to naval vessels, but there was no answer on any of the bands—not even the blare of a gentlemen! The set is uninjured. The waves are what have been upset. I have shattered them around your ship, just as I can eventually shatter them all over Central Europe! For the next two hours, no radio messages can enter or leave my zone of radio silence—of refracted radio waves, set up by my little station on one of the neighboring islets!" There was a long pause, while commander and navigator stared at him. "Your secrecy might well cost the United States navy one of its best light cruisers—and us our lives!" he said angrily. "We need that check by radio at once! If you're not talking nonsense, call off your dogs till we learn just where we are!" Androka held out his palms helplessly. "I can do nothing. I have given orders to my assistant that he must keep two hours of radio silence! I can get no message to him, for our radio is dead!" his treasures with the jealous care of a mother hen, and spent hours Commander and navigator had both scribbled verifications of the closed. The sky was again a blanket of darkness pouring sheets of rain at them. understand—better dead?" Curtis said: "I understand." "And if the Nazi agents in America knew of the islet from which my zone of silence is projected—" Androka paused, his head tilted to one side, as if he were listening to something— On deck, there was shouting and commotion. Curtis rushed out, pulling Curtis' ears with a note of impending tragedy. Then the ship struck. Everything movable shot ahead until it brought up at the end of a swing or smacked against something solid. "Get out the collision mat!" Curtis ordered. "We ought to be able to keep her up!" And then he became aware of a deadly stillness. A vast wall of silence enveloped the entire cruiser. Looking over the side, he could no longer see the waves that a few minutes before had beaten savagely against the Somehow, Curtis' mind flashed to the stories he'd heard of the forts of There were those who said it was the work of sappers who had tunneled explanations— The vapor clouds that enveloped the All about the deck lay the forms of unconscious seamen, suddenly shroud of mist and steadied it, so that the cruiser would not be completely at the mercy of the wind and the waves. was completely walled in by the yellowish-gray mist. He felt his senses swimming. the other was "convoy." But gradually his eardrums fallen in a heap on the bridge. And after that, he wasn't conscious of Comerford in a lazy, rolling motion, as she lay with her bow nosing into the sandbar at the entrance of the inlet. From her bridge, Navigating Officer Nelson watched the gas-masked figures moving about the decks, descending companionways—like goblins a goblin himself, with his face covered by a respirator. At his side, The limp bodies of the crew were being carried to the lowered accommodation ladder and transferred into waiting lifeboats. —lives that'd have been lost if the forts had to be taken by for a career in the United States navy—and no one suspected me. No while the efficient stretcher-bearers worked industriously to remove the limp bodies of the unconscious crew and row them ashore. "Funny thing about him," Bradford put in, "is that his inventions work. That zone of silence cut us off completely." Kommander Brandt nodded. "Goodt! But you got your message giving your "Yes," Nelson said. "That came through all right. And won't Curtis have a time explaining it!" "Hereafter," Brandt said solemnly, "the zone of silence vill be projected from the Comerford imperfectly crystallized stones, but far more valuable to us than watching the convoys closely for weeks for just such a cargo as the to rid the below-decks atmosphere of the lethal gas that had overcome the American crew. found himself lying in wet sand, on a beach, somewhere, with the his limbs were stiff and numb. His nose and throat felt parched inside, Comerford had been cruising off the Maine coast. This probably was one of the islets of that region, or it might be the mainland. It was hard work getting to his feet, and when he did manage to stand, he could only plant his heels in the sand and sway to and fro for fully forms of men sprawled on the beach There was a solemn note in Dillon's voice. "No, sir. She's been worked off the sandbar and put to sea!" The words struck Curtis with the numbing shock of a blow on some nerve which smelled strongly of treachery and sabotage. place that the men who had seized her had been waiting here for that very purpose. The pieces of the picture fitted together like a jigsaw puzzle—Androka's zone of silence the bearings given by radio Navigating Officer Nelson's queer conduct. They were all part of a

<question>:
What is the significance of the evidence of human lodging on the islet?

<options>:
A Nazis were hiding out there.
B It will give Curtis and his crew mates shelter while they a stranded.
C The Americans have outposts everywhere.
D The Islet is where the zone of silence is to be built.

<answer>:

A