input: Text: (A) The story takes place on Mars, not Venus. Over the last four or five generations, Mars’ conditions have caused its human colony to mutate in order to better survive. This causes a racial rift between humans from Earth and humans from Mars, which sets the story’s plot by imposing tension between the two groups. (B) Over the last four or five generations, Venus’s conditions have caused its human colony to mutate in order to better survive. Differences in appearance cause a racial rift between humans from Earth and humans from Venus, which sets the story’s plot by imposing tension between the two groups. (C) Over the last fifteen generations, Venus’s conditions have caused its human colony to mutate in order to better survive. This causes a racial rift between humans from Earth and humans from Venus, which sets the story’s plot by showing Venusians in a bad light. (D) Over the last two or three generations, Venus’s conditions have caused its human colony to mutate into swamp people. This causes a holocaust of humans from Venus, which sets the story’s plot by imposing tension between the two groups. DOUBLECROSS by JAMES Mac CREIGH Revolt was brewing on Venus, led by the descendant of the first Earthmen to land. Svan was the leader making the final plans—plotting them a bit too well. The Officer of the Deck was pleased as he returned to the main lock. There was no reason why everything shouldn't have been functioning perfectly, of course, but he was pleased to have it confirmed, all the same. The Executive Officer was moodily smoking a cigarette in the open lock, staring out over the dank Venusian terrain at the native town. He turned. "Everything shipshape, I take it!" he commented. The OD nodded. "I'll have a blank log if this keeps up," he said. "Every man accounted for except the delegation, cargo stowed, drivers ready to lift as soon as they come back." The Exec tossed away his cigarette. " If
  Question: What is one way the story’s setting, Venus, affects the characters and and sets up the plot? 
  Answer:
output: Over the last four or five generations, Venus’s conditions have caused its human colony to mutate in order to better survive. Differences in appearance cause a racial rift between humans from Earth and humans from Venus, which sets the story’s plot by imposing tension between the two groups.