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

<passage>:
Ryzga made a savage, wholly futile effort to lift the weapon in his paralyzed hand. Then his eyes rolled upward, and abruptly he went limp and fell in a heap, like a mechanical doll whose motive power has steep were its with the Ryzgas themselves, who slept within, ready to wake and conquer.... Var felt Neena beside him, and drew her close. As she sobbed her relief, At sunset they were in sight of the Ryzga mountain. Strangely it towered raised his head, he saw that the drama's end had had a further audience. Var. In the outer doorway, backed by his clansmen, stood Groz, gazing first in stupefaction at the fallen Ryzga, then with something like awe at Is our feud finished, or does your ambition for a worthy son-in-law go beyond the conqueror of the Ryzgas?" then he smiled, and asked, "Well, Groz? The ice-wind blew from the glacier, but Var's love was round her as a be death for Var, and for Neena living shame. Which of the two was worse was no longer a simple problem to Var, who had grown much older in the cliffs and sheer its crevasses. But its outward perils could not compare The two young people stared for a long minute, intrigued and fearful. Both had heard of this place, and the ancient who lived there to keep watch on the Ryzga mountain, as a part of the oldest legends of their childhood but neither had been here before. Warming to the old man now, Var sketched his and Neena's history Var nodded somberly, thinking that an old recluse would in any case be Var grinned mirthlessly. "We haven't much choice, since they're nestled by Var's side. He asked, "And you—are you willing to follow and on all men." "We know the stories," Var said brusquely. "In the hollow heart of their mountain the Ryzgas sleep, as they chose to do when their world crumbled. But if they are wakened, the mountain will tremble, and the Ryzgas will come forth." "Do you believe that?" "As one believes stories." power in the old man's look, the power of four hundred years' wisdom. Var stared down at his hands. "The Ryzgas also were men," said the Watcher. "But they were such a race as the world has not seen before or since. There were tyrannies before the Ryzgas, there was lust for power, and atrocious cruelty but such tyranny, power, and cruelty as theirs, had never been known. They ruled of their shaping—the scattered wreckage of the things they made. And we—we too are a remnant, the descendants of the few out of all humanity that survived when the Ryzgas' world went down in flame and thunder. "In the last generation of their power the Ryzgas knew by their science that the race of man would endure them no longer. They made ready their weapons, they mined the cities and the factories for destruction, making Meanwhile they redoubled the yoke and the punishments, hastening the completion of the last of the starships. "From the memories that the old Watchers have left here, and from the memories of dead men that still echo in the air, I have gathered a Var and Neena stared, unstirring, with wide vacant eyes, while the old the Ryzgas' might had been forged, eyes that stared white and half sightless from the glare of the furnaces, gnarled hands that now at long last clutched the weapons of the last rebellion—a rebellion without hope of new life on a world gutted and smoldering from the fulfilment of the Ryzgas' dream, without slogans other than a cry for blood. Before them death waited around the citadel where the masters still fought. All round, from the lowest and most poisonous levels of the through—before. With deep respect now he gazed upon the bent old man who was the Mountain Watcher. "Some of the Ryzgas took flight to the stars, and some perished on Earth. But there was a group of them who believed that their time to rule would come again. These raised a black mountain from the Earth's Neena pressed her face against Var's shoulder, hiding her eyes. In her Neena sat up and stifled a cry of fright. Var growled, "Who are you? Var passed a hand across bewildered eyes. Neena said softly, "Thank you, Watcher." "Don't thank me. I take no sides in your valley feuds. But now you are rested, your minds are clear. Do you still mean to go on to the Ryzga mountain?" face was unsmiling. "It is this. You, Var, can flee up the canyon to the That possibility had not occurred to them at all. Var and Neena looked Ryzga mountain." Quickly, he impressed on them what he had learned of the structure of only by its echo in Neena's cross the gorge more surely and swiftly. When Var and Neena set foot at Var sent his thoughts probing beyond the curtain, listened intently, Var and Neena turned. Far out in the sea of fog, on a dream bridge that Neena's hand tightened on Var's. Var sent a thought of defiance: "Go Neena reel against him until, summoning all his strength, he broke the At Var's thought command Neena froze instantly. "Feel that!" he great wheels commenced to turn, the mechanical servitors of the Ryzgas woke one by one and began to make ready, while their masters yet slept, for the moment of rebirth that might be near at hand. Without warning, lights went on. Blinking in their glare, Var and Neena their machineless culture. In all the brilliant space there was no life. They looked at one another, the same thought coming to both at once: perhaps, after two thousand years, the masters were dead after all, and Var and Neena huddled frozenly, half expecting each instant to be their last. And the Ryzga too stood motionless, looking down at them. He was a man of middle height and stocky build, clad in a garment of changing colors, of fabric delicate as dream-stuff. In his right hand, That, and his movements when he came slowly down the ramp toward them, conveyed a queer suggestion of weariness or weakness, as if he were yet not wholly roused from his two millenia of slumber. But the Ryzga's manner and his mind radiated a consciousness of power, a pride and assurance of self that smote them like a numbing blow. With a new shock, Var realized that the Ryzga's thoughts were quite crawling, laboring to do the Ryzgas' will— toward the stars, the indicated in the passage above. Then wake the rest...." Var was staring in fascination at the Ryzga's face. It was a face formed by the custom of unquestioned command the driving will they had sensed a moment earlier. It was a sick man's face. The Ryzga's final thought clicked into place: Decision! He turned Ryzga froze, teetering off balance and almost falling, as a numbing grip closed down on all his motor nerves. the Ryzga's frantic eyes. They glared back at him with such hatred and such evil that for an instant he almost faltered. But the Ryzga's efforts, as he strove to free himself from the neural hold, were as misdirected and unavailing as those of a child who has not learned to wrestle with the mind. Var had guessed right. When Neena in her terror had flung a dream monster into the Ryzga's way—a mere child's bogey out of a fairy tale—the Ryzga had not recognized it as such, but had taken it for a will be no new beginning for you in our world, Ryzga! In two thousand years, we've learned some new things. Now at last I understand why you built so many machines, such complicated arrangements of matter and

<question>:
Var and Neena most likely belong to which group:

<options>:
A A mutated strain between the slaves and masters of the Ryzgas
B Descendants of the slaves of the Ryzgas
C Members of an alien group that destroyed the Ryzgas
D Descendants of the Ryzga masters

<answer>:

B