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

<passage>:
Granthan's mission was the most vital of the war. flag down, started up with a clash of gears and pulled out without looking. There was a first-aid cabinet across the compartment from me. I up Everest, but I reached it after a couple of years, and found the microswitch on the floor that activated the thing, and then I was fading out again.... work. I fumbled my way into a couch and tried to think. In my condition—with a broken leg and third-degree burns, plus a fractured skull—I shouldn't have been able to fall out of bed, much less make the trip from I flipped the switch and gave the emergency call-letters Col. Ausar Kayle of Aerospace Intelligence had assigned to me a few weeks before. "Granthan!" he burst out. "Where are the others? What happened out was sabotaged. So was Gilgamesh have some kind of long-range telehypnotic ability that might make it possible for them to subvert a loyal man without his knowledge. You've told me yourself that you blacked out during the attack—and came to on the lifeboat, with no recollection of how you got there. "This is war, Granthan. War against a vicious enemy who strike without warning and without mercy. You were sent out to investigate the possibility of—what's that term you use?—hyper-cortical invasion. You know better than most the risk I'd be running if you were allowed to pass the patrol line. "I'm sorry, Granthan. I can't let you land on Earth. I can't accept the risk." "What do I do now?" I stormed. "Go into orbit and eat pills and hope you think of something? I need a doctor!" Presently Kayle replied. "Yes," he said. "You'll have to enter a parking orbit. Perhaps there will be developments soon which will make been condemned to death. II was alone and injured, aboard a lifeboat that would be the focus of a converging flight of missiles as soon as I approached within battery range of Earth. I had gotten clear of the Gool, but I wouldn't survive my next meeting with my own kind. They couldn't take the chance that I was acting under Gool orders. what had happened. I lay back, cleared my mind of extraneous thoughts, and concentrated on the trigger word that would key an auto-hypnotic sequence.... " It is a contact, Effulgent One! " hatch was open and I pulled myself through, forcing the broken leg. My blackened hand fumbled at the locking wheel. Then the blast as the lifeboat leaped clear of the disintegrating dreadnought—and the world-ending impact as I fell. At a level far below the conscious, the embattled pseudo-personality lashed out again—fighting the invader. " " " Impossible! Do you forget all my teachings? Cling, though you expend the last filament of your life-force! " are instantaneous and total, my monitoring basic personality fraction followed the skillful Gool mind as it engraved its commands deep in my subconscious. Then the touch withdrew, erasing the scars of its been done to me. Hesitantly, I felt for the immaterial fabric of the continuum, warping me! " Using the technique I had grasped from the Gool itself, I struck, the passages through which tendrils ran out to immense caverns where smaller creatures labored over strange devices. These, my host's memory would transport the spawn to the new worlds the Prime Overlord had discovered, worlds where food was free for the taking. Not sulphur trough. They would spread out across a galaxy—and beyond. But not if I could help it. In the past, they had managed to control a man here and there, among the fleets, far from home, but only at a superficial level. Enough, perhaps, to wreck a ship, but not the complete control needed to send a man back to Earth under Gool compulsion, to carry out complex sabotage. Then they had found me, alone, a sole survivor, free from the clutter of the other mind-fields. It had been their misfortune to pick a their kind. Matter across space. a Gool robot. But what I have is too big to let you blow it up without a fight. Matter transmission! You know what that can mean to us. The concept is too complex to try to describe in words. You'll have to take cross-networks of conditioned defensive responses, the shunt circuits to the decoy pseudo-personality, leaving my volitional ego free. I ego-complex. I might have saved my breath. "Z four-oh-two, I am reading your IFF. Decelerate at 1.8 gee preparatory to picking up approach orbit...." keys, spoke into his microphone: "As you were, Z four-oh-two. Continue on present course. At Oh-nineteen seconds, pick up planetary for re-entry and let-down." I blanked out the man's recollection of what had happened, caught his belated puzzlement as I broke contact. But I was clear of the DEW line now, rapidly approaching atmosphere. "Z four-oh-two," the speaker crackled. "This is planetary control. I am picking you up on channel forty-three, for re-entry and let-down." There was a long pause. Then: "Z four-oh-two, countermand DEW Line clearance! Repeat, clearance countermanded! Emergency course change to standard hyperbolic code ninety-eight. Do not attempt re-entry. Repeat: do not attempt re-entry!" It hadn't taken Kayle long to see that I'd gotten past the outer line of defense. A few more minutes' grace would have helped. I'd play it dumb, and hope for a little luck. "Planetary, Z four-oh-two here. Say, I'm afraid I missed part of that, fellows. I'm a little banged up—I guess I switched frequencies on you. What was that after 'pick up channel forty-three'...?" "Four-oh-two, sheer off there! You're not cleared for re-entry!" "Hey, you birds are mixed up," I protested. "I'm cleared all the way. I screens blanked off.... For an hour I rode the long orbit down, fending off attack after disorientation as the escape capsule separated from the sinking lifeboat deep under the surface. Then my escape capsule was bobbing on Kayle of Aerospace Intelligence." Kayle's face appeared. "Don't fight it, Granthan," he croaked. "You penetrated the planetary defenses—God knows how. I—" "Later," I snapped. "How about calling off your dogs now? And send somebody out here to pick me up, before I add sea-sickness to my other complaints." Granthan." "I'm sorry, Granthan," Kayle said. "It's too late—even if I could from your gallant attempt. Mr. Granthan, I salute you." "Goodbye, Granthan. Try to understand...." through the cluster of minds. "— missile on course do right, baby. That's it, right in the slot. I fingered my way through the man's mind and found the control centers. He turned stiffly from the plotting board, tottered to a panel to slam his hand against the destruct button. Men fell on him, dragged him back. "— fool, why did you blow it? " I dropped the contact, found another, who leaped to the panel, detonated the remainder of the flight of six missiles. Then I withdrew. I would have a few minutes' stay of execution now. I was ten miles from shore. The capsule had its own power plant. I to fill my pockets when I left the escape capsule in the shallows off I had barely made it to the fishing boat, whose owner I had coerced inconspicuously as possible. I didn't disturb the bandages. I needed new clothes—or at least different ones—and something to "Hey! Where you goin' with my glass?"

<question>:
Why did Granthan get in the lifeboat?

<options>:
A To get away from the fire
B To tend to his injuries
C Because he was the only survivor
D To go back to Earth to cause damage

<answer>:

D