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

<passage>:
Then Wes Kirk revealed the secret to his people's enemies—and found that his betrayal meant the death of the girl he loved. [Transcriber's Note: This etext was produced from Wes Kirk shut his teeth together, hard. He turned his back on Ma Kirk The hackles rose golden and stiff across Kirk's back. He said carefully, "Who's to hear it?" Kirk raised his heavy overlids and let his pupils Kirk raised his shaggy head. The light of the yellow star they called The baby cried. Ma Kirk shrilled at her son, and two of the younger ones fought over a bone with no meat on it, rolling and snapping on the Kirk's voice was soft in his thick throat. "I would like to kill them," "Yah!" cried a shrill voice over his shoulder. "All but the Captain's Kirk spun angrily around. Lil, next below himself, danced back out of his arm and jerked the curtain down and shot away again, making two jumps over the brawling young ones and the box of heat-stones. Kirk didn't say anything. He started to walk around the heat box. Lil Kirk stopped. "Aw, I wasn't going to hurt her. She has to be so smart!" Kirk looked at the little box of heat-stones, his pupils shrinking. kill them—all but the Captain's yellow daughter?" Kirk's big heavy chest swelled. "Ma," he said, "you make that brat shut "All right," said Kirk sullenly. He squatted down, holding his hands "Maybe," said Kirk heavily, "it all goes to the same place." Crash , and nobody knows how long ago that was. They think they can go on doing it. They Kirk looked at the thin fuzzy baby curled tight in the skins. "There aren't enough heat-stones to go around any more. Why should they let their young ones cry with the cold?" There was silence in the room again. Kirk felt it, thick and choky. His heart kicked against his ribs. He was scared, suddenly. He'd never talked that much before. It was the baby, crying in the cold, that set him off. Suppose someone had heard him. Suppose he was reported for a Nerves crackled icily all over Kirk's skin. But there wasn't any need Kirk began to move, very swiftly and quietly. Before the third gong stroke hit them he had his spear and his sling and was already lifting aside the door curtain. "Yeah," said Kirk. "I'll watch out for him." Kirk shivered in the cold wind. "Lil," he said. "I would, too, kill the There was no conviction in her voice. The wind was freezing on Kirk's Randl nudged Kirk's elbow. "Look at 'em," he said, and coughed. He was always coughing, jerking his thin sharp face back and forth. Kirk could them in splinters. Kirk said fiercely: Kirk looked up. Someone was standing at the doorway of the Captain's It was a big raid. Kirk saw that when he scrambled up out of the last drove them, and sometimes the dead ones weren't quite dead and it was too bad for the man who climbed on them. It looked to Kirk as though the pillbox was pretty far gone. No time to think about that. Wite, the second son of the First Officer, was signalling for double time. Kirk ran faster, his ears twitching furiously as they sifted the flying echoes into some kind of order. Pa hadn't been alone, of course. Frank and Russ went with him. The Kirk's nose wrinkled at the smell of blood. He avoided the biggest over the wall. Kirk speared him left-handed in the belly, dodged the downstroke of his loaded sap, and kicked the body out of the way. He said, "Wonder how they got so close, so fast?" head—a couple of them had grazed him by now—and spears showered down, but they weren't climbing the walls any more. He stopped. Kirk put a stone accurately through the back of a Pirut's drop, looking at it. There was blood on it, running clear to the elbow. He went down beside Randl, putting his arms around him, trying to see. Randl shook him off. "Don't move me, you fool! Just listen." His voice was harsh and rapid. joined the shoulder. Kirk could see the bright blood beating up through Kirk nodded. He couldn't say anything. The heat was dying in Randl's Kirk bent. He didn't move for a long time. After a while Randl's voice Randl's hands slid away, so that Kirk could see the hole the stone had Kirk sat there, holding Randl in his arms. Presently someone came up and shook Kirk's shoulder and said, "Hey, Kirk laid the body carefully on the stones and got up. "Yeah." He looked at Kirk's face and shut up suddenly. He turned away and Kirk followed. The wind was cold, howling up from the outer gullies. "I'm Wes Kirk, sir. You wanted me?" "Yes." The O.D. was also the Third Officer. Taller than Kirk, thinner, his horny overlids. He said quietly: "I'm sorry to have to tell you this...." Kirk knew. The knowledge leaped through him. It was strange, to feel a He hadn't, after the first glance. "Your father, and his two friends." Kirk shivered. The horny lids dropped over his eyes. "I wish I'd known," he whispered. "I'd have killed more of them." "Kirk," he said, "this is going to be hard to explain. I've never done anything as hard. The Piruts didn't kill them. They were responsible, but they didn't actually kill them." "We saw them coming up the tongue of rock. The Piruts were behind them, but not far. Not far enough. One of the three, it wasn't your father, called to us to put the ladder down. We waited...." A muscle began to twitch under Kirk's eye. That, too, was something "I didn't want to give the order. God knows I didn't want to! But there was nothing else to do." A man came up over the top of the ladder. He was carrying a body over his shoulder, and breathing hard. "Here's Kirk," he said. "Where'll I put him?" been afraid like this, either. He didn't know what he was afraid of. Something in the Officer's voice. He helped to lay his father down. He'd seen bodies before. He'd handled them, fighting on the pillbox walls. But never one he'd known so long, one he'd eaten and slept and wrestled with. The thick arm that hauled Kirk's voice wasn't a voice at all. "You killed them. You killed my father." "Three lives, against all those back on the plain. We held our fire too long as it was, hoping. The Piruts nearly broke through. Try to understand! I had to do it." Kirk's spear made a flat clatter on the stone. He started forward. Men Kirk relaxed. He was shivering and covered with rime from body sweat. Somebody whistled. "Six men! Didn't know the kid had it in him." discipline me. You better kill me, because, if you don't, I'll kill you." "I don't blame you, boy. Go and rest. You'll understand." "I'll understand, all right." Kirk's voice was a hoarse, harsh whisper "That's mutiny. For God's sake, don't make things worse!" "Worse for us, or for you?" Kirk was shouting, holding his head up in close to Kirk. Kirk's eyes were hot and not quite sane. He couldn't have stopped if while he was dying. The Captain's yellow daughter, sneaking heat-stones into...." The Officer hit him on the jaw, carefully and without heat. Kirk sagged He said quietly, but so that everyone could hear him, "Discipline, for not longer than it takes to clear the rock below."

<question>:
What happened to Kirk's father?

<options>:
A His father was killed by a fellow citizen
B His father was trapped in a barrier until he died
C His father was killed by the enemy
D His father accidentally fell to his death

<answer>:

A