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

<passage>:
some friends of his, who had become game for beasts of prey, or been He was a man of the world now, weary of exploring and ready to settle down. He was anxious to see his family again, his father and mother and all his brothers and sisters entrance to their cave and tell of the wondrous places he'd visited. And, most of all, he wanted to see Na, graceful, dark eyed Na, whose fair face had disturbed his slumber so often, appearing in his dreams to call him home. chase. For a long moment Ro studied the approaching creatures. Then he gasped in surprise. The pursued was a young woman, a woman he knew. Na! The figures. He could see the rat man plainly now—his fanged, frothy ribs and backbone cracked under the blow. He was dead before he struck the ground. With hardly a glance at his fallen foe, Ro ran on to meet the girl. She fell into his arms and pressed her cheek to his bare shoulder. Her dark eyes were wet with gladness. Warm tears ran down Ro's arm. face a mask of respect. The young Martian tried to be stern in meeting her gaze, as was the custom among the men of his tribe when dealing with women but he smiled instead. "Since a long time," she answered sadly. Then she cried. And between sobs she spoke: everywhere a red man showed himself, he cried out and died by the flame from the white men's weapons. and those of us who lived still travel alone." Ro groaned aloud as Na finished her tale. His homecoming was a meeting with tragedy, instead of a joyful occasion. Together we will fight the rat men." Na smiled. Ro was angry, but anger did not make him blind. He would make a good mate. He turned away from the valley to study Na. She was very beautiful. Her dark eyes seemed to sparkle and her hair shone in the twilight. He understood why she had crept into his dreams. He took a pouch from his waist and shook out a gold arm band. This he clasped on Na's wrist. "All men will know now that you are the mate of Ro," he whispered. And he kissed her, as was the custom of his tribe when a man took a wife. Without another word he disappeared over the edge of the cliff. They had already made plans for their next meeting. There was no need for a prickled. He prayed he wouldn't be seen. An alarm now would spoil his plan. 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 Once again his mind grew light. The girl's thoughts assured him she would follow his instructions. They rose quietly and trailed him into the woods. The girl whispered something to one of the men. Ro turned and glared at her through the shadows. The progress they made was slow, but gradually the distance between "Who is Na?" asked the girl. "She is the one I have chosen for my mate," Ro answered. The white girl was silent. They traveled quite a distance without communicating. Each was busy with his own thoughts. 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 set his twisted legs and bared his fangs. The fur on his back stood out The rat man's tail lashed out to twist around Ro's neck. With frantic strength, Ro tore it away before it could tighten. Ignoring the Oan's slashing teeth, the young Martian pounded heavy It wasn't until too late that I discovered my mistake." Ro gathered the girl in his arms. He spoke softly to her to help her forget. The man with the silver hair seemed very old and weak, but very wise. The other men had hair as black as any Martian's, but their skin was pure white. They were handsome, Ro thought, in a barbaric sort of way. One was lean and determined, the other, equally determined, but stouter and less impressive. Ro then centered his attention on the girl. Her the lean man nodded—"Grimm—" the stouter man acknowledged the a short distance away. Her arms were loaded with Manno, the fruit of Mars, and clusters of wild berries and grapes. "You see," she said, "I will make you a good mate. Our table will be well provided for." "You will make no mate at all," Ro said sternly, "and there will be no table if you wander off. Your next meeting with the Oan may not be so fortunate." He glared at her for a moment, then smiled and helped her with her burden. beside Carlson, but moved away shyly now that it was daylight. He noticed, too, that Grimm was seeing the same thing and seemed annoyed. Ro smiled. These young white men were no different than Martians where a girl was concerned. When they had finished breakfast, they sat around the floor of the cave It was Carlson who asked, "How do you expect the six of us to attack Grimm laughed. Ro sprang to his feet to tower above the man. His handsome face was 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. Grimm climbed to his feet and backed away. Ro advanced on him, his "Tell him I'm speaking the truth, professor," said Grimm aloud. The professor repeated Grimm's words with his thoughts. "It would be he turned back to the others, his attention was centered on Na. "Perhaps the attraction you seem to hold for the Oan can be put to good use," he said aloud. "The sphere is a distance away from the Oan yourself, you can lure the guards away from their post." He repeated his plan to the others. "But they'll kill her," gasped Charlotte. "She will be a woman alone," said Ro. "The Oan prefer to capture women when they can." "Then she'll be captured," the professor said. "It's much too risky." Ro laughed. cliffs, waiting to pelt them with stones. Carlson or Grimm can be with "It might work at that. Grimm can go with you. Carlson and Charlotte "Why me?" Grimm demanded. "Why not Carlson? Or are you saving him for Carlson grabbed Grimm by the shoulder and spun him around. He drove a Grimm stumbled backward. He fell at the cave's entrance. His hand, at Carlson from a sitting position. It caught Carlson in the shoulder. Gritting his teeth, Carlson charged at Grimm. But Ro moved more Grimm brushed himself off as he got to his feet Carlson turned to Ro. "I'll go with you," he said. "Grimm can go with Charlotte and the sphere. She will remain hidden until you have circled away from her. Then she will reveal herself." Ro looked at Na for a long moment before they parted. He grew very proud of what he saw. There was no fear in her eyes. Her small chin was firm. Carlson seemed to come out of a trance. He swung around to trail Ro up 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 senseless, besides. Charlotte and I are planning to be married when we return to America. It's not as though Grimm was still in the running. I'm sure he'll see reason when we tell him. It's foolish to be enemies." "Why don't you take her for your wife here on Mars? That would end the trouble completely." Carlson seemed surprised. Ro seemed puzzled, then he laughed. 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 but kept them to himself. The pictures he'd received from Carlson

<question>:
Why did Grimm dislike Carlson?

<options>:
A He hit him with a rock
B He hit him with a fist to the face
C He bossed him around
D He was jealous of his relationship with the woman

<answer>:

D