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

<passage>:
RETIEF OF THE RED-TAPE MOUNTAIN Retief knew the importance of sealed in to handle the situation, Retief—under sealed orders." He picked He passed the buff envelope across to Retief. "Hold on," said Retief. "I've got to get down. They won't shoot at you." "They shore won't, sonny. I ain't givin' 'em the chance." He started punching keys on the console. Retief reached out, caught his wrist. "Maybe you didn't hear me. I said I've got to get down." The pilot plunged against the restraint, swung a punch that Retief blocked casually. "Are you nuts?" the pilot screeched. "They's plenty Retief crawled into the narrow cockpit of the skiff, glanced over the controls. The pilot ducked out of sight, came back, handed Retief a the missile, and Retief was slammed violently against the restraining ping of hot metal contracting. Coughing, Retief disengaged himself from the shock-webbing. He beat out sparks in his lap, groped underfoot for the hatch and wrenched it open. A wave of hot jungle air struck him. He lowered himself to a bed Retief edged back around the trunk, eased down behind a fallen log. As he passed, Retief rose, leaped the log and tackled him. struggled in silence. Retief flipped him onto his back, raised a fist— Flap-jack boat looks just like 'em. I took a shot when I saw something mistake. Lemuel's a tough man to explain something to." "I'm—" "Keep your head down. These damn Flap-jacks have got some wicked hand weapons. Come on...." He moved off silently on all fours. Retief Retief looked down at the charred, torn and sweat-soaked powder-blue Flap-jack." "I won't, but—" Potter was on his way, loping off up a gentle slope. Retief pulled off "We're damn glad you're here, mister," said a fat man with two revolvers belted across his paunch. "We can use every hand. We're in bad shape. We ran into the Flap-jacks three months ago and we haven't made a smart move since. First, we thought they were a native form we hadn't run into before. Fact is, one of the boys shot one, thinkin' it you know these Embassy stooges." "We heard they were sending some kind of bureaucrat in here to tell us to get out and give the oases to the Flap-jacks," said Swazey. He tightened his mouth. "We're waitin' for him...." Retief got to his feet. "I think I should explain—" Retief's left fist shot out, smacked Lemuel's face dead center. He "Later. Sit tight and keep your eyes open." Retief took a bearing on a right this time.... There was a sudden rasp, like leather against concrete, and a flurry of sand as the Flap-jack charged. Retief rolled aside, then lunged, threw his weight on the flopping Flap-jack—a yard square, three inches thick at the center and all muscle. The ray-like creature heaved up, curled backward, its edge rippling, to stand on the flattened rim of its encircling sphincter. It scrabbled with prehensile fringe-tentacles for a grip on Retief's shoulders. He wrapped his arms around the alien and struggled to his feet. The thing was heavy. A hundred pounds at least. Fighting as it was, it seemed more like five hundred. The Flap-jack reversed its tactics, went limp. Retief grabbed, felt a thumb slip into an orifice— The alien went wild. Retief hung on, dug the thumb in deeper. "Sorry, fellow," he muttered between clenched teeth. "Eye-gouging isn't gentlemanly, but it's effective...." The Flap-jack fell still, only its fringes rippling slowly. Retief relaxed the pressure of his thumb the alien gave a tentative jerk "Now we understand each other," said Retief. "Take me to your leader." Twenty minutes' walk into the desert brought Retief to a low rampart of thorn branches: the Flap-jacks' outer defensive line against Terry forays. It would be as good a place as any to wait for the move by the Flap-jacks. He sat down and eased the weight of his captive off his back, but kept a firm thumb in place. If his analysis of the situation was correct, a Flap-jack picket should be along before too long.... A penetrating beam of red light struck Retief in the face, blinked off. He got to his feet. The captive Flap-jack rippled its fringe in an agitated way. Retief tensed his thumb in the eye-socket. "Sit tight," he said. "Don't try to do anything hasty...." His remarks Retief turned. An immense Flap-jack, hung with crimson trappings, rippled at his side. The voice issued from a disk strapped to its back. Tape," Retief added. "Take place, Retief," said Hoshick. "I hope you won't find our rude couches uncomfortable." Two other large Flap-jacks came into the room, communed silently with Hoshick. "Pray forgive our lack of translating raised a tube, manipulating it deftly with his fringe tentacles. Retief Outside on the starlit sand Retief tossed aside the power pistol, followed it with the leather shirt Swazey had lent him. By the faint light he could just make out the towering figure of the Flap-jack retainers were grouped behind him. "Of course," Retief said, "if you'd prefer a more plebeian type of contest...." "By no means. But perhaps we could rule out tentacle-twisting, just to even it." "Very well. Shall we begin?" With a rush Hoshick threw himself at Retief, who ducked, whirled, and leaped on the Flap-jack's back ... and felt himself flipped clear by a mighty ripple of the alien's slab-like body. Retief rolled aside as Hoshick turned on him he jumped to his feet and threw a right hay-maker to Hoshick's mid-section. The alien whipped his left fringe around in an arc that connected with Retief's jaw, sent him spinning onto his back ... and Hoshick's weight struck him. Retief twisted, tried to roll. The flat body of the alien blanketed him. He worked an arm free, drumming blows on the leathery back. Hoshick nestled closer. Retief's air was running out. He heaved up against the smothering skin tomorrow ... if there was a tomorrow. His thumb found the orifice and probed. The Flap-jack recoiled. Retief held fast, probed deeper, groping with the other hand. If the alien were bilaterally symmetrical there would be a set of ready made hand-holds.... There were. Retief dug in and the Flap-jack writhed, pulled away. Retief held on, scrambled to his feet, threw his weight against the alien and fell on top of him, still gouging. Hoshick rippled his fringe wildly, flopped in terror, then went limp. Retief relaxed, released his hold and got to his feet, breathing hard.

<question>:
How does Retief subdue both of the Flapjacks that he wrestles?

<options>:
A Flapjacks are terrified of water, and he spit on them, which acts as a burning agent on a Flapjack.
B He mashes his thumb into an opening which Retief thought was the eye, but which Hoshick implies is involved in Flapjack reproduction.
C He mashes his thumb into an opening identified by Retief and verified by Hoshick as being the Flapjack's eye, in each case.
D He twists the Flapjacks' tentacles, which is excruciatingly painful to a Flapjack.

<answer>:

B