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

<passage>:
When Johnson found him, he found too the secret to that Extensive research did not uncover any evidence that the U.S. copyright on this publication was renewed.] Johnson got rain in his eyes, his nose, and his ears. That was the way Johnson. Opening the door of the joint, it was noise instead of rain humans and Venusians, the love feelings were heavily tinged with straight sex. He sniffed at them, feeling them somewhere inside of him, Caldwell, sitting in a booth next to the door, glanced up as Johnson entered but neither Caldwell's facial expression or his eyes revealed that he had ever seen this human before. Nor did Johnson seem to recognize Caldwell. ze work tonight instead of being wiz ze dreamers. Ah, ze great Unger hisself!" The headwaiter kissed the tips of his fingers. one?" As he was speaking, the headwaiter was deftly conducting Johnson at the bar. Behind it, a Venusian was bowing to him. "Tarmur," Johnson below the necklace ... Johnson felt his pulse quicken, for two reasons. here who would cut her pretty throat for the sake of the necklace that circled it? "They are beautiful," he said, smiling. "Thank you." "I was referring to the bubbles." doubt in his mind that she knew what she was saying. "And my name is Vee Vee." "Don't you think it's a nice name?" "I certainly do. Probably the rest of it is even nicer." Sombrely, Johnson regarded her. What was she doing here? Was she in said. "Not any longer," he laughed. "You have decided them?" "Yes." "Every last one of them?" "Oh, there might be one or two matters undecided somewhere, say out on the periphery of the galaxy. But we will solve them when we get to himself into an empty stool on his left. The man was Caldwell. of the corner of them he watched Caldwell's hand lying on the bar. The fingers were beating a quick nervous tattoo on the yellow wood. "I haven't seen him," Caldwell's fingers beat out their tattoo. "But I think he is, or was, here." "Um," Johnson said, his eyes on Vee Vee. "How—" "Because that girl was asking for him," Caldwell's fingers answered. "Your friend is not as drunk as he seems," Vee Vee said, watching Caldwell. "My friend? Do you mean that drunk? I never saw him—" be something else. And he might be there. "If you try to use the Karmer grip on me again I'll break your arm," he said. His voice was low but there was a wealth of meaning in it. "I won't do it again," the girl said stoutly. "I never make the same mistake twice." "Good," Johnson said. "The second time we break our victim's neck," Vee Vee said. "What a sweet, charming child you—" "I told you before, I'm not a child." "Um!" Surprise sounded in his grunt. "But apples don't grow on Venus." "Eve's daughters don't use apples any more, darling. Come along." Johnson saw that Caldwell had risen and was following them. Caldwell's signs. Johnson ignored them. With Vee Vee's fingers lightly patting his he had not grown accustomed to them. He wondered if any human ever did. A touch of chill always came over him as he crossed the threshold. In entering these places, it was as if some unknown nerve center coldness now. Vee Vee's fingers left off patting his arm. "Yes." "What is it?" "How would I know?" "Please!" Her voice grew sharp. "I think Johnny Johnson ought to know." "Johnny! How do you know my name?" "Shouldn't I recognize one of Earth's foremost scientists, even if he "But—" "And who besides Johnny Johnson would recognize the Karmer nerve grip and be able to break it instantly?" "Hell—" "John Michael Johnson, known as Johnny to his friends, Earth's foremost "And how would I make certain you were Johnny Johnson, except by seeing there was no doubt who you were!" Her words went on and on. "Who are you?" His words were blasts of sound. "Please, darling, you are making a scene. I am sure this is the last thing you really want to do." He looked quickly around them. The Venusians and humans moving into to her. Again she patted his arm. "Relax, darling. Your secrets are safe with me." suddenly weak. The fingers on his arm were very gentle. "No harm will come to you. Am I not with you?" were—his life, Caldwell's life, possibly Vee Vee's life hung in the Caldwell had said that she had been asking about Martin. What connection did she have with that frantic human genius he sought here? Johnson felt his skin crawl. He moved toward a nest of cushions on "Sorry, bud. Didn't mean to bump into you." Caldwell's voice was still thick and heavy. He sprawled to the floor on Johnson's left. Under seconds. True, the person they knocked unconscious would be all right the next effective weapons, but Johnson had a fondness for them. The feel of the little weapon inside his coat sent a surge of comfort through him. The music picked up a beat, perfume seemed to flow even more freely Johnson felt his chest muscles contract, then relax. Vee Vee's fingers caught the flutter of her breathing. On his left, Caldwell stiffened Vee Vee's fingers dug deeper into Johnson's arm. "How—" "Shhh. Nobody knows." No human knew the answer to that trick. Unless perhaps Martin— Unger bowed. A little ripple of something that was not quite sound dug at Johnson's arm as if they were trying to dig under his hide for had suddenly become a frightened child looking for protection. "Haven't you ever seen this before?" he whispered. lay motionless. Johnson found himself with the tendency to hold his was not prepared to disagree. Around him, he saw that the Venusians were already going ... going ... going.... Some of them were already gone. This was an old experience to them. They went rapidly. Humans went more slowly. his vision, out of nowhere, out of nothingness. The room, the Dreamer, the sound of the music, the sweetness of the perfume, Vee Vee and Caldwell were gone. They were no longer in his reality. They were not in the range of his vision. It was as if they did not exist. Yet he knew they did exist, the memory of them, and of other things, was out on the periphery of his universe, perhaps of the Back when he had been a kid he had dreamed of flight to the far-off stars. He had made models of space ships. In a way, they had shaped his that here and now he was making contact with a vision that belonged to time. told him that Caldwell was still sitting like a chunk of stone.... The not heard it before in this place. He thought about the space ship he had seen. woman in love. He tried again for the space ship. It would not come. and there with a multitude of tiny pinches, like invisible fleas biting him. Another voice took its place. "This is another damned vision!" the second voice said. "This ... A multitude of tiny voices seemed to whisper through him. It was as if the parts of his body had suddenly found voices and were reporting to him what they were doing. These were voices out of his training days if action is taken before the time for it—if that time ever comes—we can all die." "Die?" the chorus quavered. "Yes," Johnson said. "Now be quiet. When the time goes we will all go together." The chorus went into muted silence. But just under the threshold the little voices were a multitude of tiny fretful pressures. "Please!" Johnson said. silence went. Voices came. "Who did that?" "What happened?" Johnson had no time to ask her what she meant. Somewhere in the back is here!" "To hell with the woman!" Caldwell grunted. "Martin's the important Johnson followed.

<question>:
What is the relationship between Caldwell and Johnson?

<options>:
A They're strangers
B They're coworkers
C They're new acquaintances
D They're old friends

<answer>:

B