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 U.S. copyright on this publication was renewed.] Score one or one million was not enough for the human race. It had to be all or nothing ... with one man doing every bit of scoring! Arthur Lanceford slapped futilely at the sith buzzing hungrily around the rain missed—but for that time, it should discourage the sith. As far as permanent discouraging went, the repellent was useless. Once one of those eight-legged horrors checked you off, there were only two possible endings to the affair—either you were bitten or you killed the critter. It was as simple as that. him. He had been bitten once already and the memory of those paralyzed three minutes while the bloodsucker fed was enough to last him for Niobe was the native word for Earth, or perhaps "the world" would be planet and its mythological Greek namesake had much in common. background sound that never ceased, sobbing with soft mournful noises on the rubbery broadleaves, crying with obese splashes into forest pools, blubbering with loud, dismal persistence on the sounding protection suit an instrument of torture that slowly boiled its wearer in his own sweat. But the suit was necessary, for exposed human flesh was irresistible temptation to Niobe's bloodsucking insects. Many of these were no worse than those of Earth, but a half dozen species were deadly. The first bite sensitized. The second killed—anaphylactic shock, the medics called it. And the sith was one of the deadly species. Lanceford shrugged fatalistically. Uncomfortable as a protection suit He looked at Kron squatting beside the trail and envied him. It was too bad that Earthmen weren't as naturally repellent to insects as Like the dominant species on every intelligent planet in the explored anything. Lanceford couldn't repress an involuntary shudder at some of the thatch that furnished protection from the rain and sanctuary for uncounted thousands of insects. most of it hung in an acrid undulating layer some six feet above the floor. The glow outlined the squatting figures of a dozen or so natives clustered around the pit, watching the slowly rotating carcass of a small deerlike rodent called a sorat, which was broiling on a spit Clustered around the fire, the hunters turned to look at him curiously and, after a single eye-filling stare, turned back again. Niobians were almost painfully polite. Although Earthmen were still enough of a curiosity to draw attention, one searching look was all their customs allowed. Thereafter, they minded their own business. In some ways, system could handle the unsavory mess, but his taste buds shrank from the forthcoming assault. What the natives classed as a delicate and and offensive, and one simply didn't offend the natives. The BEE was explicit about that. Courtesy was a watchword on Niobe. considered worthy of the name unless a generous helping of vorkum started it off. An entree like that could ruin the most rugged human appetite, but controlled the nausea and tactfully declined the greasy handful which Kron offered. The Niobian never seemed to learn. At every meal they had offered him samples of the mess. With equal persistence, he had refused. After all, there were limits. were strange and unaccountable. The hunters didn't protest when he retired to his sleeping platform and the more acceptable concentrates from his pack. His hunger satisfied, sitting in on a Niobian meal and this one was worse than usual. Huge siths, reeking of vorkum, pursued him as he ran naked and defenseless body juices through his face net—and they had touched his skin! That wouldn't normally have been bad, but the sith bite he had suffered a week ago had sensitized him. He was developing an anaphylactic world was alien. Occasionally danger tended to recede into a background The super-antihistamine developed by the Bureau was an unpredictable sort of thing. Sometimes it worked and sometimes it didn't. He removed three years ago, yet already the planet was famous not only for its It was the source of a complex of alkaloids known as gerontin, and gerontin had the property of tripling or quadrupling the normal life span of mammals. Despite the fact that most life is based on carbon, oxygen and water, spurred on by the people who composed it. The exploration of Niobe proceeded at all possible speed. With so many considerations weighed against them, what did a few lives matter? For the sake of the billions of humanoids in the Confederation, their sacrifice was worthwhile anti-allergin apparently wasn't going to work, for it should have had some effect by now. He shrugged mentally—it was the chance one took in this business. But he couldn't say that he hadn't been warned. Even old were old during the Dark Ages before the Atomic Revolution, sending foot parties to explore a world in the chance that they might discover going to worry about it. In fact, there wasn't much time left to worry. The reaction was observably and painfully worse. It was important that the news of his death and the specimens he had collected get back to Base Alpha. They might have value in this complex game Alvord Sims was playing with men, machines and Niobe. But Base he carried in his pack, but his first abortive motion convinced him it was useless. The blinding agony that swept through him at the slightest movement left no doubt that he would never finish the business of their range, limited at best, was practically nonexistent on a planet that literally seemed to be one entire "dead spot." A fixed-frequency among the aliens. Surprisingly, the effects were the same—the livid swellings, the gasping breath, the pain. Strange how these foreigners reacted like his own people. He scratched his head and pulled thoughtfully at one of his short ears. It went to extremes—even with life at stake, a person's wishes and beliefs must be respected. wishes, which didn't include a request for help, but merely to get his pack back to the others in their glass dome. It was astonishing that such an obviously intelligent species should have so little flexibility. They didn't understand the first principles of adaptation. Always and forever, they held to their own ways, trying with insensate stubbornness to mold nature to their will—and when nature overcome their artificial defenses, they died, stubborn, unregenerate, inflexible to the end. They were odd, these humans—odd and a little frightening. to himself. He listened. There might be something important in these dying murmurings, something that might explain their reasons for being here and their strange driving haste that cared nothing for life. Earthman myth that the BEE had fostered. alive, particularly on jobs like this one. We don't wear these suits and repellent because we like hunthouse was deserted save for himself and the Earthman. With characteristic Niobian delicacy, the hunters had left, preferring to thankful that they were gone, for what he was about to do would shock their conservative souls. wasn't a pleasant way to die. And then, quite suddenly, the pain eased. A creeping numbness spread like a warm black blanket over his outraged nervous system. The stuff Kron had given him apparently had some anesthetic properties. He felt dimly grateful, even though the primitive native nostrum would probably do no good other than to ease the pain. The blackness went just far enough to paralyze the superficial areas of his nervous system. It stopped the pain and left him unable to move, but the deeper pathways of thought and reason remained untouched. He was conscious, although no external sensation intruded on his thoughts. thoughts, of oddly sardonic laughter, of pity and regret that such a little thing as understanding should cause death and suffering through its lack, of bewildered admiration for the grim persistence of the alien Earthmen, mixed with a wondering curiosity about what kept them here—what the true reasons were for their death-defying persistence aliens.

<question>:
What was true about the bugs on the planet?

<options>:
A All of them had fatal bites
B None of them had fatal bites
C They killed a lot of natives
D Some of them were harmless

<answer>:

D