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

<passage>:
Revolt was brewing on Venus, led by the they come back." just like us—" "Not any more. Four or five generations ago they were. Lord, they don't even look human any more. Those white, flabby skins—I don't like them." "Acclimation," Lowry said scientifically. "They had to acclimate themselves to Venus's climate. They're friendly enough." Venusian mist. The native guard of honor, posted a hundred yards from the Earth-ship, stood stolidly at attention with their old-fashioned They think there will be hordes of immigrants from Earth, now that we know Venus is habitable. And there's some sort of a paltry underground group that is spreading the word that the immigrants will drive the native Venusians—the descendants of the first expedition, that After all, the fittest survive. That's a basic law of—" The annunciator over the open lock clanged vigorously, and a metallic voice rasped: "Officer of the Deck! Post Number One! Instruments reports a spy ray focused on the main lock!" Lowry, interrupted in the middle of a word, jerked his head back and stared unbelievingly at the tell-tale next to the annunciator. Sure enough, it was glowing red—might have been glowing for minutes. He snatched at the hand-phone dangling from the wall, shouted into it. "Set up a screen! Notify the delegation! Alert a landing party!" But even while he was giving orders, the warning light flickered suddenly Svan clicked off the listening-machine and turned around. The five others in the room looked apprehensive. "You see?" Svan repeated. "From head. "Svan, I'm afraid," she said. "Who are we to decide if this is a good thing? Our parents came from Earth. Perhaps there will be trouble at first, if colonists come, but we are of the same blood." Svan laughed harshly. " don't think so. You heard them. We are not human any more. The officer said it." agreed. "Svan, what must we do?" Svan raised his hand, thoughtfully. "One moment. Ingra, do you still convinced by Svan. "And the rest of us? Does any of us object?" Svan eyed them, each in turn. There was a slow but unanimous gesture of "Good," said Svan. "Then we must act. The Council has told us that we Earth-ship returns, it means disaster for Venus. Therefore, it must not return." Svan nodded. "No. They will leave. But they will never get back to Earth." "Never get back to Earth?" the old man gasped. "Has the Council Svan shrugged. "The Council did not know what we would face. The Svan smiled, and it was like a dark flame. He reached to a box at his surface of the globe with a pallid finger—"to do nothing for forty No answer. Svan jerked his head. "Good," he said. "Ingra, bring me that left. She shook them out and handed the bowl to Svan, who was rapidly "This is the plan," he said. "We will go, all six of us, in my ground car, to look at the Earth-ship. No one will suspect—the whole city The other five will start back. Something will go wrong with the guards will be called. There will be commotion—that is easy enough, after all dark—they will take off before sunrise, because they must travel away from the sun to return—in forty hours the danger is removed." There was comprehension in their eyes, Svan saw ... but still that uncertainty. Impatiently, he crackled: "Look at the slips!" Instinctively they had opened the slip, turned it over and over, striving to detect if it was the fatal one. They had felt nothing.... up now, around at his neighbors. Svan waited impatiently for the chosen A traitor! his subconscious whispered. Svan thought faster than ever before in his life. If there was a of a second, Svan had considered the evidence and reached his decision. The six conspirators in Svan's old ground car moved slowly along the main street of the native town. Two Earth-ship sailors, unarmed except "Good," said Svan, observing them. "The delegation is still here. We They all are of them understands what this means. They're afraid. brakes. A Venusian in the trappings of the State Guard advanced on them Svan spoke up. "We want to look at the Earth-ship," he said. He opened Svan stepped closer, his teeth bared in what passed for a smile. "It He strove instinctively to bring the clumsy rifle up, but Svan was lay unconscious, his skull a mass of gore at the back where Svan had Svan grunted as his fingers constricted brutally. Svan rose, panting, stared around. No one else was in sight, save the petrified five and the ground car. Svan glared at them contemptuously, jungle. Even while Svan watched the body began to sink. There would be Svan strode back to the car. "Hurry up," he gasped to the girl. "Now Venus has no moon, and no star can shine through its vast cloud layer. of the Earth-ship, cursed the blackness. "Can't see a thing," he complained to the Exec, steadily writing away at the computer's table. "Look—are those lights over there?" The Exec looked up wearily. He shrugged. "Probably the guards. Of course, you can't tell. Might be a raiding party." something happens to the delegation?" "Then we're in the soup," the Exec said philosophically. "I told you the natives were dangerous. Spy-rays! They've been prohibited for the last three hundred years." guard around us. The administration is co-operating every way they know how. You heard the delegation's report on the intercom. It's this secret group they call the Council." "And how do you know the guards themselves don't belong to it?" the Exec retorted. "They're all the same to me.... Look, your light's gone Svan hesitated only a fraction of a second after the girl turned the said. "They won't be expecting anyone to come from behind the ship—we were wise to circle around. Now, you know what you must do?" Ingra nodded, while the others remained mute. "We must circle back Svan, listening, thought: not be drawn away. I am glad I can't trust these five any more. If they must be destroyed, it is good that their destruction will serve a Aloud, he said, "You understand. If I get through, I will return to the the bomb will not explode until the ship is far out in space. Remember, you are in no danger from the guards." From the guards , his mind echoed. He smiled. At least, they would Abruptly he swallowed, reminded of the bomb that was silently counting off the seconds. "Go ahead," he ordered. "I will wait here." "Svan." The girl, Ingra, leaned over to him. Impulsively she reached Svan looked after them. The kiss had surprised him. What did it mean? its own fierce rockets. Svan's mist-trained eyes spotted the circling Paralyzed, he heard the girl's voice. "Svan! They're coming! They found the guard's rifle, and they're looking for us! Thirty Earthmen, Svan, for you. We must flee!" "Amazing," the surgeon said dryly. "Well, they won't do any bombing Lowry was staring at the huddled, mutilated form of Svan. He shuddered.

<question>:
How do Svan and his five fellow insurgents find out that the people of Earth no longer think of  Venusians as human?

<options>:
A They are informed by fellow Venusian rebels, who themselves heard from the council.
B They already know. Racism and prejudice runs rampant in all Venusian and Earth towns.
C They intercept a galactic transmission, which explains it all.
D They use a spy ray, which allows hem to listen in on a conversation happening on an official

<answer>:

D