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 Anglers of Arz There were two pinkish, bipedal fishermen on the tiny be an angler, a fish, and some bait. All three existed on Arz but there inevitable pre-dawn rainbow began to shimmer over the eastern ocean. bipedal Arzian fishermen posted on the tiny coral islet a quarter-mile offshore, their blank triangular faces turned stolidly toward the beach. "They're at it again," Farrell called, and dropped to the mossy turf outside. "Roll out on the double! I'm going to magnofilm this!" Stryker and Gibson came out of their sleeping cubicles reluctantly, belting on the loose shorts which all three wore in the balmy Arzian his fringe of white hair tousled and his naked paunch sweating. He looked, Farrell thought for the thousandth time, more like a retired the crew, a blocky man in his early thirties with thick black hair and heavy brows that shaded a square, humorless face. water. "You know I can't do that, Arthur. These Arzians may turn out to be Fifth Order beings or higher, and under Terran Regulations our tampering with what may be a basic culture-pattern would amount to armed invasion. We'll have to crack that cackle-and-grunt language of theirs and learn something of their mores before we can interfere." Farrell turned an irritable stare on the incurious group of Arzians gathering, nets and fishing spears in hand, at the edge of the sheltering bramble forest. "What stumps me is their motivation," he said. "Why do the fools go out to that islet every night, when they must know damned well what will happen next morning?" of a fixation with Gibson, and his dogged insistence—coupled with an "Get set! Here they come!" Out of the morning rainbow dropped a swarm of winged lizards, twenty feet in length and a glistening chlorophyll green in the early light. They stooped like hawks upon the islet offshore, burying the two Arzian fishers instantly under their snapping, threshing bodies. Then around the outcrop the sea boiled whitely, churned to foam by a sudden uprushing of black, octopoid shapes. "The squids," Stryker grunted. "Right on schedule. Two seconds too late, as usual, to stop the slaughter." A barrage of barbed tentacles lashed out of the foam and drove into the melee of winged lizards. The lizards took the air at once, leaving behind three of their number who disappeared under the surface like harpooned seals. No trace remained of the two Arzian natives. "A neat example of dog eat dog," Farrell said, snapping off the magnoscanner. "Do any of those beauties look like city-builders, Gib?" Chattering pink natives straggled past from the shelter of the thorn forest, ignoring the Earthmen, and lined the casting ledges along the beach to begin their day's fishing. his litter of notes. Sleep did not come to him at once a vague sense of something overlooked prodded irritatingly at the back of his consciousness, but it was not until drowsiness had finally overtaken him that the discrepancy assumed definite form. He recalled then that on the first day of the of the pink fishers had fallen from a casting ledge into the water, and spear-shafts. Which meant that the fishers could not swim, else some And the Marco's crew had explored Arz exhaustively without finding any completed itself with automatic logic, almost rousing Farrell out of his doze. "I'll be damned," he muttered. "No boats, and they don't swim. Then how Farrell shrugged. "I'd agree with you offhand if it weren't for Gib's Later he remembered that Stryker dissolved a tablet in his glass, but at the moment it meant nothing. In a matter of minutes the older man's snoring drifted to him, a sound faintly irritating against the velvety hush outside. The Arzians did not swim, and without boats.... It occurred to him then that there had been two of the pink fishers on he was intrigued and at the same time annoyed by the enigmatic relation that linked the Arzian fishers to the dragons and squids, and his desire to understand that relation was aggravated by the That is, he thought wryly, if Terran colonists could stomach the weird custom pursued by its natives of committing suicide in pairs. He went over again the improbable drama of the past three mornings, and of transportation that placed the Arzians in pairs on the islet, when his whole fabric of speculation fell into a tangled snarl of inconsistencies. He gave it up finally how could any Earthman briskly, eager for action now that he had begun. Just inside the edge of the bramble he came upon a pair of Arzians curled up together on the mossy ground, sleeping soundly, their triangular faces wholly blank and unrevealing. He worked deeper into the underbrush and found other sleeping couples, but nothing else. There were no humming insects, no twittering night-birds or scurrying rodents. He had worked his way close to the lassitude swept him into a darkness deeper than the Arzian night. His last conscious thought was not of his own danger, but of Stryker—asleep and unprotected behind the Marco's he caught the pinkish blur of an Arzian fisher standing beside him, and cried out hoarsely in sudden panic when he tried to turn his head and could not. He was on the coral outcropping offshore, and except for the involuntary muscles of balance and respiration his body was paralyzed. The first red glow of sunrise blurred the reflected rainbow at his feet, but for some seconds his shuttling mind was too busy to consider the Worn out by his work, Stryker had made certain that he would not be easily disturbed. outcrop just under the surface of the water, waiting with barbed with shock-born lucidity: I wanted a backstage look at this show, and now I'm one of the cast The scouter darted for shore with Farrell lying across Gibson's knees in of the octopods were swimming strongly for shore, holding the rigid Arzian native carefully above water between them. "None," Gibson said. "I think the city must have been built ages ago—by men or by a manlike race, judging from the architecture—and was submerged later by a sinking of land masses that killed off the original builders and left Arz nothing but an oversized archipelago. The squids took over then, and from all appearances they've developed a culture of their own." "I don't see it," Stryker complained, shaking his head. "The pink fishers—" "Are cattle, or less," Gibson finished. "The octopods are the dominant "Because the octopods own the islands too, and keep them policed," Gibson said patiently. "They even own the pink fishers. It was one of the squid-people, making a dry-land canvass of his preserve here to pick a couple of victims for this morning's show, that carried you off last night." suddenly, a great irrepressible bellow of sound. "Arz is a squid's sportsmen. The flying-lizards are the game they hunt, and they raise the pink fishers for—" Farrell swore in astonishment. "Then those poor devils are put out there deliberately, like worms on a hook—angling in reverse! No wonder I couldn't spot their motivation!" the octopods get curious enough about us to make trouble. Do you feel up don't think I want to stick here and be used for bait again, do you?" free of Arz.

<question>:
What makes the fisherpeople of Arz most like bait?

<options>:
A They are defenseless
B They are the color of beetle bait
C They are used to lure larger prey
D They appear lifeless

<answer>:

C