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 together—conversations which they would end abruptly when anyone else came within earshot. And Nelson had always been chummy with the worst Radio is an absolute necessity in modern Curtis recalled that Nelson and Androka had long conversations trouble maker in the crew—Bos'n's Mate Bradford. always acted as if he had some secret, something to hide. organization—and particularly in modern naval organization. If you could silence all radio—silence of that sort would be deadly! Extensive research did not uncover any evidence that 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— the men lined up, according to their respective classifications, for a check-up on the missing. When this was completed, it was found that the entire complement of two hundred and twenty men were present—except concentration, as his bushy gray head bent over his drawing board. crew was marooned on an islet, about a square mile in Androka had arrived on board the area equipment of any kind, and that no boats had been left for them. that they had been put ashore without food or extra clothing or equipment, including a number of things that looked like oxygen tanks, which were now stored in the forward hold. Androka had watched over 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 a place where two hundred or more men could have camped. Sometimes, Curtis thought old Androka was a bit wacky—a scientist 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 laboratory. . At other times, the man if this might have been the source of Androka's zone of silence, when seemed a genius. Perhaps that was the answer—a mad genius! Curtis was studying the wreckage of the wireless station, wondering under the domination of the Nazi gestapo on board. But there was no question of his ability. He was a good navigating officer—dependable, accurate, conscientious. Nevertheless, Androka, with a quizzical grin. "Old Czech-and-Double-Czech is working of good-natured joking aboard the Comerford ever since the navy Don't let a little error get you down!" "As if by providence, sir, there's a clear patch. I'm wondering—" His to move in these waters with such a possibility of error!" Androka decrees silence over the German airways! Try it! Try it, I say!" "Try again!" he told the operator. "See what you can get!" 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 ships or amateurs on the shorter. "Dead!" Androka muttered, with a bitter laugh. "Yet not dead, "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!" winking at the two officers over Androka's discomfiture, and asked for numbers. Ignoring the gibbering Androka, who was wailing his disappointment that messages had penetrated his veil of silence, they raced for the chart room. Nelson went back to the bridge, and Androka returned to the commander's has done something to the tingle they sent through his inquiring fingers. Curtis left him at it, and went to rejoin Androka in the cabin. He found the little inventor pacing up and down, shaking his fists in the air hopelessly." "Seems to me," Curtis said dryly, "this invention can harm your friends as much as your enemies." are other inventions to supplement this one. Put them together, and they will defeat the Nazi hordes which have ravaged my country!" Curtis was a little shocked by the hatred that gleamed in Androka's A far-away look came into Androka's eyes. He did not seem to hear knew what I am doing, all of them would be better dead. You understand—better dead?" of silence is projected—" Androka paused, his head tilted to one side, at the end of a swing or smacked against something solid. themselves struck numb and helpless by a gas that had been flooded into the inner compartments of their strongholds. fallen in a heap on the bridge. And after that, he wasn't conscious of from an ancient fairy tale or a modern horror story. Nelson looked like 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!" "It was a crackpot who invented the gas we used to break up the Maginot Line," Bradford reminded him. "It saved a lot of lives for the World War. My mother committed suicide when she learned that we were penniless. My father—" He paused and cleared his throat. " "My father dedicated me to a career of revenge—to wipe out his wrongs," Nelson continued. "If America hadn't gone into the First World War, he wouldn't have lost his business my mother would still be living. When he joined the Nazi party, the way became clear to use "Maybe Curtis'll find out his suspicions were justified," Nelson said bitterly. "But it won't do Curtis any good—a commander who's lost his ship." He turned to Brandt. "You have plenty of men to work the Comerford ?" Brandt nodded his square head. "We have a full crew—two hundred here secretly, a few at a time, during the past six weeks!" The three—Brandt, Nelson and Bradford—stood on the bridge and talked, while the efficient stretcher-bearers worked industriously to remove the limp bodies of the Androka had brought aboard the strange figure of Professor Zukor Androka! "The professor's in his glory!" Nelson remarked to Kommander Brandt. "Funny thing about him," Bradford put in, "is that his inventions work. That zone of silence cut us off completely." a time explaining it!" "Hereafter," Brandt said solemnly, "the zone of silence vill be projected from the Androka's vich vill be even more useful vhen ve come to cut the "What's the idea?" capturing a United States navy cruiser." "Can we trust Androka?" Nelson asked, with a sudden note of suspicion "Yes," Brandt assured him. "Of all men—we can trust Androka!" "The gestapo takes care of Czechs and Poles and Frenchmen and other foreigners whom it chooses as its agents," Brandt pointed out. "Androka has a daughter and other relations in Prague. He knows that if anything misfires, if there is the slightest suspicion of treachery on his part, his daughter and the others will suffer. Androka's loyalty is assured!" room that served as Androka's laboratory and workshop. According to his last calculations, the 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 which smelled strongly of treachery and sabotage. As he thought back, he realized that he might have prevented the had been deliberately steered to this place puzzle—Androka's zone of silence never trusted him. Nelson

<question>:
What is an important lesson Androka should have learned from his failed attempts in the article?

<options>:
A Being motivated by hatred is the most beneficial motivation.
B Pursuing self-interest can have negative impacts all around you.
C Communication is key, especially when lost at sea.
D It is better to work alone than with others.

<answer>:

B