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

<passage>:
naval organization. If you could silence all radio—silence of that sort would be deadly! [Transcriber's Note: This etext was produced from still some unconscious men to be revived. In a sheltered cove among the rocks, an exploring group had found enough dry driftwood to make a fire— Comerford Comerford's Comerford Comerford's crew was marooned on an islet, about a square mile in area Comerford that they had been put ashore without food or extra clothing or his treasures with the jealous care of a mother hen, and spent hours daily in the room in the superstructure that had been assigned as his laboratory. 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 Ensign Jack Dillon came up to him. "There's a coast-guard cutter heading for the island, sir," he announced. Comerford This storm—" Curtis threw his arm around Nelson's dripping shoulders. "Forget it! Don't let a little error get you down!" out from under his arm. "It's got me worried. Quartering wind of undetermined force, variable and gusty. There's a chop to the sea—as if from unestimated currents among the islets. No chance to check by observation, and now there is a chance—look at me!" 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 to move in these waters with such a possibility of error!" Nelson complied, and the throbbing drive of the engines lessened 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 The radio man leaped to his seat and tried frantically. Again and again, he sent off a request for a cross-bearing from shore stations 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 high-powered commercial program in the higher reach, nor the chatter of "Dead!" Androka muttered, with a bitter laugh. "Yet not dead, 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. Curtis was the first to speak. "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!" As if to mock him, the ship's radio began to answer: Comerford Comerford Comerford Comerford Comerford Comerford Comerford Comerford "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 picked up, and was being relayed all over the ship. The words struck on Curtis' ears with a note of impending tragedy. "Breakers ahead!" He was beside Navigating Officer Nelson on the bridge, and saw the helmsman climbing the rapidly spinning wheel like a monkey as he put it "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 ship. Comerford Comerford the swinging wheel. Then a gas-masked figure appeared through the shroud of mist and steadied it, so that the cruiser would not be completely at the mercy of the wind and the waves. Curtis heard the anchor let down, as if by invisible hands, the chain 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 from an ancient fairy tale or a modern horror story. Nelson looked like Comerford's Nelson swore under his breath. "Reckon it'll take a couple of hours before the ship's rid of that damn gas!" Bradford shook his head in disagreement. "The old geezer claims he's got a neutralizing chemical in one of them tanks of his that'll clear everything up inside half an hour." "I'd rather get along without Androka, if we could!" Nelson muttered. "He's nothing but a crackpot!" Comerford Comerford's Comerford "Funny thing about him," Bradford put in, "is that his inventions work. That zone of silence cut us off completely." "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 Comerford not sink her." "What's the idea?" "Her cargo," Brandt explained. "It iss more precious than rubies. It Brazil—through the blockade," Nelson said, "without taking the risk of capturing a United States navy cruiser." "There are other things Germany needs desperately on board the Carethusia "Yes," Brandt assured him. "Of all men—we can trust Androka!" foreigners whom it chooses as its agents," Brandt pointed out. "Androka Comerford . The masked German seamen were installing some sort of apparatus that portholes were being opened, and men were spraying chemical around to rid the below-decks atmosphere of the lethal gas that had overcome the Comerford's Brandt came over to where Nelson was standing on the bridge and held out his hand. "Congratulations, Herr Kommander Nelson!" he said. "Ve have stolen one of the United States navy's newest and fastest cruisers!" He made a Comerford had been cruising off the Maine coast. This probably was one of the islets of that try to make a roll call. Is there any sign of the ship?" 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 center. For the first time, he realized fully the tragedy that had swept down on him. He had lost his ship—one of the United States navy's fastest and newest small light cruisers—under circumstances which smelled strongly of treachery and sabotage. As he thought back, he realized that he Comerford 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>:
Why is Brandt interested in The Comerford?

<options>:
A He is holding the ship ransom as revenge for what American has done to Germany.
B He is holding the ship ransom for Boarts—black diamonds.
C He wants to use its zone of silence to apprehend the Carthusia.
D He wants to use its zone of silence to trick other ships into crashing on the islet.

<answer>:

C