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

<passage>:
fight for a race of which they had never heard. ears. And having quenched his curiosity about these people and their to call him home. He breathed a sigh of relief as he reached the jungle's edge. Before him lay a broad expanse of plain. And far in the distance rose the Mile after mile fell behind him. His long, well muscled legs carried him swiftly toward the distant hills. His movements were graceful, easy, as the loping of Shee, the great cat. he searched the ground with his eyes. When he found what he sought—a furry face and twitching tail. The Oan, however, was too intent The Oan squealed in terror and tried to swerve from his course. The fear of one who sees approaching death was in his movements and his cry. He had seen many Oan die because of the strength and accuracy in in strange garb from the neck down, even to coverings on their feet. They made signs of peace—with one hand only, for they carried weapons of a sort in the other. And the men of our tribe made the same one-handed sign of peace, for they would not risk dropping their stones. Then the white men spoke but their tongue was strange, and our men signaled that they could not understand. The white men smiled, and a great miracle took place. Suddenly to our minds came pictures and words. The white men spoke with their thoughts. "They came from a place called Earth, they said. And they came in peace. Our men found they could think very hard and answer back with woman with golden hair, and the other, a man of age, with hair like silver frost. "There was a great feast then, and our men showed their skill at throwing. Then the white men displayed the power of their strange weapons by pointing them at a tree and causing flame to leap forth to burn the wood in two. We were indeed glad they came in peace. mother's voice. She had spoken those words when he was a child, to keep him from straying too far. The Oan was only a few feet away now, but his eyes were not cutting He lay flat on his stomach and inched his way ahead. It was slow work, but safer. When a sound reached his ears he drew himself together and feigned sleep. In the dusk he appeared no different than the others. was almost simple now. The difficult part was done. Straining his eyes, he caught sight of a golden mass some feet away. Crouching low, he darted toward it. In a moment his outstretched hands contacted a soft body. It seemed to shrink from his touch. A tiny gasp reached his ears. "Be still," he thought. He remembered Na's words: ' We spoke with our thoughts. ' "Be still. I've come to free you." And then, because it seemed so futile, he whispered the words aloud. Then his mind seemed to grow light, as though someone was sharing the weight of his brain. An urgent message to hurry—hurry reached him. It was as though he was feeling words, words spoken in the light, sweet voice of a girl. Pictures that were not actually pictures entered his mind. Waves of thought that took no definite form held a plain meaning. "Don't move when you are free," he warned the girl as he worked. "I must release the others first. When all is ready I will give a signal with my thoughts and you will follow me." Once again his mind grew light. The girl's thoughts assured him she would follow his instructions. Finally the man with the silver hair asked, "Why did you risk your life to rescue us?" "With your help I will avenge the death of my father and brothers and the men of my tribe." He stopped walking and stared around him for a landmark. They had strength, Ro tore it away before it could tighten. The man with the silver hair seemed very old and weak, but very wise. One was lean and determined, the other, equally determined, but stouter almost as lovely as Na. "Tell me," he asked suddenly, "where is this strange place you come from? And how is it that you can speak and cause others to speak with their minds?" It was the old man who answered. "We come from a place called Earth, many millions of miles away through space. My daughter, Charlotte, my two assistants, Carlson—" the lean man nodded—"Grimm—" the stouter man acknowledged the Earth it was the year twenty-two hundred." "We have nothing like that here," said Ro, still puzzled. "But tell me, about this speaking with the mind. Perhaps I shall understand that." "It's simple telepathy. We have mastered the science on Earth. It takes study from childhood, but once you have mastered the art, it is quite simple to transmit or receive thoughts from anyone. A mere matter of concentration. We—who speak different tongues—understand each other because of action we have in mind as we speak. We want the other to walk, we think of the other walking. A picture is transmitted and understood. It is a message in a Universal language." Ro sighed. "I am afraid we are very backward here on Mars," he said wearily. "I a short distance away. Her arms were loaded with Manno, the fruit of When they had finished breakfast, they sat around the floor of the cave and spoke. have your weapons. But now that you are free, you can make more of these sticks that shoot fire." Grimm laughed. twisted in anger. "You're lying," he shouted aloud, forgetting that the white man couldn't understand his words. "You're lying because you are afraid. You refuse to help me avenge my people because you are more of a coward than the Oan." The old man also rose. He placed a restraining hand on Ro's arm. "He's lying," said Ro with his thoughts. "Tell him I'm speaking the truth, professor," said Grimm aloud. The professor repeated Grimm's words with his thoughts. "It would be impossible to make new guns here," he said. "But there is another way. "What is it?" he demanded. "Perhaps the attraction you seem to hold for the Oan can be put to camp. All of the rat men cannot be guarding it. Perhaps, by revealing yourself, you can lure the guards away from their post." He repeated his plan to the others. "But they'll kill her," gasped Charlotte. when they can." "Then she'll be captured," the professor said. "It's much too risky." "In the meantime, you can take over the unguarded sphere. The rest will be easy." The professor smacked his fist into his palm. "Why me?" Grimm demanded. "Why not Carlson? Or are you saving him for swiftly. He caught the white man and forced him back. "This is no time for fighting," he said. "When the Oan are defeated you can kill each other. But not until then." Grimm brushed himself off as he got to his feet be trapped. They would die under a hailstorm of rock. "You would have liked a more tender goodbye with Charlotte," Ro said to Carlson as they worked. "Was it fear of Grimm that prevented it?" Carlson straightened. He weighed Ro's words before answering. Finally he said, "I didn't want to make trouble. It was a bad time, and "Why don't you take her for your wife here on Mars? That would end the speak of 'legal' or 'ceremony.' After all, it's a personal matter. Who can tell us whether it is 'legal' or not? What better ceremony than a kiss and a promise?" He bent back to his work chuckling. "I could argue the point," Carlson laughed. "I could tell you about a place called Hollywood. Marriage and divorce is bad enough there. Under your system, it would really be a mess. But I won't say anything. Here on Mars your kiss and a promise is probably as binding as any ceremony." Ro didn't speak. He didn't concentrate and transmit his thoughts, but kept them to himself. The pictures he'd received from Carlson were confusing. The business at hand was more grim and important than untangling the puzzle.

<question>:
What was most likely the strongest motivator for humans to develop telepathy?

<options>:
A Telepathy takes less concentration than speaking aloud.
B Telepathy is ideal for keeping sensitive information secret, since it cannot be accidentally overheard.
C Telepathy enables communication across language barriers.
D Telepathy eliminates the misunderstanding that comes with words.

<answer>:

C