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

<passage>:
the waiting hordes on Earth. Straining metal plates twanged and echoed through her hallways. Captain Gwayne cursed and rolled over, reaching for his boots. He was a big, rawboned man, barely forty but ten years of responsibility had pressed down his shoulders and put age-feigning hollows under his were rough on the men who traveled them now. He shuffled toward the control room, grumbling at the heavy gravity. our two cadets sneaked out again. Barker followed them, but lost them in the murk. I've kept a signal going to guide them back." Gwayne swore softly to himself. Earth couldn't turn out enough starmen in the schools, so promising kids were being shipped out for training Of course there was no obvious need for caution here. The blobs hadn't seemed dangerous, and the local animals were apparently all herbivorous There were three of the blobs dancing about over the grazing animals now, as they often seemed to do. Gwayne stared at them for a minute, Earth had ordered him to detour here, after leaving his load of to the men who'd deserted their ship and its equipment, he'd have to report back. He would have left before, if a recent landslip hadn't exposed enough his eye. The blobs had left the herd. Now the three were streaking at fantastic Whatever was making the fog swirl must have reached higher ground. Something began to heave upwards. It was too far to see clearly, but Gwayne grabbed the microphone, yelling into the radio toward the cadets. They must have seen whatever it was just as the call reached them. Young Kaufman grabbed at Pinelli, and they swung around together. eight feet tall, leading the others directly toward the spacesuited cadets. Some of the horde were carrying spears or sticks. There was a momentary halt, and then the leader lifted one arm, as if motioning the others forward. "Get the jeeps out!" Gwayne yelled at Jane. He yanked the door of jeeps were lining up. One, at the front, was stuttering into life, and Gwayne dashed for it as the exit port slid back. There was no time for suits or helmets. The air on the planet was irritating and vile smelling, but it could be breathed. He leaped to up speed. The other two followed. There was no sign of the cadets at first. Then Gwayne spotted them surrounded by the menacing horde. Seen from here, the things looked horrible in a travesty of manhood. racing toward him. He made a fantastic leap backwards. Others swung about, two of them grabbing up the cadets. The jeep was doing twenty miles an hour now, but the horde began to increase the distance, in spite of the load of the two struggling boys! The creatures dived downward into lower ground, beginning to disappear into the mists. "Follow the blobs," Gwayne yelled. He realized now he'd been a fool to leave his suit the radio would have let him keep in contact with the kids. But it was too late to go back. Then it cleared to show the mob of creatures doubling back on their own trail to confuse the pursuers. There was no time to stop. The jeep plowed through them. Gwayne had a glimpse of five-foot bodies tumbling out of the way. Monstrously coarse faces were half hidden by thick hair. A spear crunched against the windshield from behind, and Gwayne caught it before it could foul the other jeeps were coming up, by the sound of their motors, but too late to help. They'd have to get to the group with the cadets in a hurry or the horde would all vanish in the uneven ground, hidden by the fog. A blob dropped down, almost touching Gwayne. Abruptly, Barker's foot ground at the brake. Gwayne jolted forward against the windshield, just as he made out the form of the eight-foot leader. The thing was standing directly ahead of him, a cadet on each shoulder. The wheels locked and the jeep slid protestingly forward. The creature leaped back. But Gwayne was out of the jeep before it stopped, diving for the figure. It dropped the boys with a surprised grunt. The arms were thin and grotesque below the massively distorted shoulders, but amazingly strong. Gwayne felt them wrench at him as his hands locked on the thick throat. A stench of alien flesh was in his the captain's attack. Its head hit rocky ground with a dull, heavy sound, and it collapsed. Gwayne eased back slowly, but it made no further move, though it was still breathing. "I hope so," Gwayne told him. "I want that thing to live—and you're "Troglodytes, maybe," Gwayne guessed. "Anyhow, send for me when you get The reports from the cadets were satisfactory enough. They'd been picked up and carried, but no harm had been done them. Now they were busy being little heroes. Gwayne sentenced them to quarters as soon as he could, knowing their stories would only get wilder and less informative with retelling. If they could get any story from the captured creature, they might save time and be better off than trying to dig through Hennessy's ship. That was almost certainly spoorless by now. The only possible answer seemed to be that the exploring expedition and Hennessy's rescue group had been overcome by the aliens. It was an answer, but it left a lot of questions. How could the primitives have gotten to the men inside Hennessy's ship? Why was its cunningly, and only the accidental slippage had undone their work. Maybe there would never be a full answer, but he had to find remotely habitable, or mankind was probably doomed to extinction. The race had blundered safely through its discovery of atomic weapons into a peace that had lasted two hundred years. It had managed to prevent an interplanetary war with the Venus colonists. It had found render the whole Solar System uninhabitable for millenia. To survive, man had to colonize. And there were no worlds perfect for him, as Earth had been. The explorers went out in desperation to find what they could the it now seemed, no more time could be wasted here. Primitives could be overcome, maybe. It would be ruthless and unfair to They were perhaps a thousand yards away, waiting patiently. For what? For the return of their leader—or for something that would give the ship to them? "Physically fine. You can see him. But—" Gwayne dropped the phone and headed for the little sick bay. He swore at Doc for not calling him at once, and then at himself for not thick features were relaxed and yet somehow intent. He seemed to make some kind of a salute as he saw Gwayne enter, and his eyes burned up Gwayne had his own ideas on that. It was easy for an alien to seize on the gold ornament of a captive earthman, even to learn a little spread out. Three. Seven. Zero. The answers were right. By the time the session was over, Gwayne had begun to understand the twisted speech from inhuman vocal cords better. But the story took a long time telling. silence. Finally Gwayne drew a shuddering breath and stood up. "Is it the fact that the change is passed on is as real as he claims." Gwayne led the former Hennessy to the exit. The waiting blobs dropped down to touch the monstrous man, then leaped up again. The crowd of monsters began moving forward toward their leader. A few were almost as tall as Hennessy, but most were not more than five feet high. The kids of the exploring party.... Back in the control room, Gwayne found the emergency release levers, puzzlement in her face. "Why?" And then, before he could answer, her own intelligence gave her the "No," he told her. "Replenish the stars." But she was no longer listening, and that part of his idea could wait.

<question>:
What isn't a reason that it was foolish for Gwayne to leave the ship in such a hurry?

<options>:
A the air is dangerous for him to breathe
B he forgot to bring the radio
C they didn't know for sure what was out there
D he was outnumbered

<answer>:

A