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

<passage>:
land. Svan was the leader making the final Extensive research did not uncover any evidence that the U.S. copyright on this publication was renewed.] 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 is—right down into the mud. Well—" he laughed—"maybe they will. 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!" "Set up a screen! Notify the delegation! Alert a landing party!" But even while he was giving orders, the warning light flickered suddenly 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 Svan laughed harshly. " agreed. "Svan, what must we do?" convinced by Svan. "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." An old man shifted restlessly. "But they are strong, Svan," he 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 authorized—murder?" Svan shrugged. "The Council did not know what we would face. The Earth-ship has." He paused dangerously. "Toller," he said, "do you object?" Like the girl, the old man retreated before his eyes. His voice was "We will let chance decide who is to do the work," he said angrily. "Is there anyone here who is afraid? There will be danger, I think...." No answer. Svan jerked his head. "Good," he said. "Ingra, bring me that bowl." there were a few left. She shook them out and handed the bowl to Svan, who was rapidly creasing the six fatal slips. He dropped them in the bowl, stirred it with his hand, offered it to the girl. "You first, Ingra," he said. Svan, too, had left his unopened. He sat at the table, facing them. "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 has been to see it already. One will get out, at the best point we can There was comprehension in their eyes, Svan saw ... but still that 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 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 for deceptively flimsy-looking pistols at their hips, stood before the Not one of them understands what this means. They're afraid. He clamped his lips. "Go faster, Ingra," he ordered the girl who was driving. "Let's get this done with." She looked at him, and he was surprised to find compassion in her that followed its thunderous crash, a man's voice bellowed: "Halt!" The girl, Ingra, gasped something indistinguishable, slammed on the brakes. A Venusian in the trappings of the State Guard advanced on them "Where are you going?" he growled. Svan spoke up. "We want to look at the Earth-ship," he said. He opened the door beside him and stepped out, careless of the drizzle. "We heard it was leaving tonight," he continued, "and we have not seen it. Is that not permitted?" The guard shook his head sourly. "No one is allowed near the ship. The order was just issued. It is thought there is danger." Svan stepped closer, his teeth bared in what passed for a smile. "It "By heaven, yes, I understand! You are the swine that caused this—" He strove instinctively to bring the clumsy rifle up, but Svan was faster. His gamble had failed there was only one course remaining. He hurled his gross white bulk at the guard, bowled him over against the splintery logs of the road. The proton-rifle went flying, and Svan savagely tore at the throat of the guard. Knees, elbows and claw-like nails—Svan battered at the astonished man with every ounce of strength in his body. The guard was as big as Svan, but Svan had the initial advantage ... and it was only a matter of seconds before the guard lay unconscious, his skull a mass of gore at the back where Svan had ruthlessly pounded it against the road. 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, then reached down and heaved on the senseless body of the guard. Over the shoulder of the road the body went, onto the damp swampland of the jungle. Even while Svan watched the body began to sink. There would be Ensign Lowry, staring anxiously out through the astro-dome in the bow of the Earth-ship, cursed the blackness. Svan hesitated only a fraction of a second after the girl turned the the compartment, though Svan's hand emerged with only one. He got out of the car, holding the sphere. "This will do for me," he said. "They won't be expecting anyone to come from behind the ship—we Svan, listening, thought: Aloud, he said, "You understand. If I get through, I will return to the city on foot. No one will suspect anything if I am not caught, because 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 feel no pain, never know what happened. With the amount of atomite in ground-shaking crash. Abruptly he swallowed, reminded of the bomb that was silently counting off the seconds. "Go ahead," he ordered. "I will wait here." 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 figures of sentries, and knew that these would be the ship's own. They would not be as easily overcome as the natives, not with those slim-shafted blasters they carried. Only deceit could get him to the side of the ship. Svan settled himself at the side of the road, waiting for his chance. He had perhaps three minutes to wait of its blinding driving-light, as it bumped to a slithering stop. 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, with those frightful guns. They fired at us, but we got away and came for you. We must flee!" swinging at his side, he made a dozen floundering steps before something immense pounded at him from behind. He felt himself lifted from the road, sailing, swooping, dropping with annihilating force The Flight Surgeon rose from beside him. "He's still alive," he said callously to Lowry, who had just come up. "It won't last long, though. What've you got there?"

<question>:
Which of the following isn't a reason that Svan's plan failed?

<options>:
A Ingra came back for Svan because guards were after them
B A guard stopped them and wouldn't let them get through
C There were more people guarding the ship because of the spy-ray
D A guard knocked him unconscious and brought him to the Earth ship

<answer>:

D