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

<passage>:
places. Standing in the sticky, sweet-smelling ooze, Alan eyed the robot apprehensively. Half buried in mud, it stood quiet in Then the robots figured out an Then another. Alan stopped, puzzled. Two more blasts, quickly Frowning, worrying about the sounds, Alan momentarily forgot to watch his step until his foot suddenly plunged into an ant hill, throwing him to the jungle floor. "Damn!" He cursed again, for the tenth time, and stood tree-bound octopus. Fitful little plants grew straggly in the ready, Alan rolled over onto his In the distance the sky blazed as a blaster roared in the jungle. Then Alan heard the approaching robot, crunching and snapping its way through the undergrowth like an onrushing forest back. In the movement, his elbow Alan peered around him at the drowned out almost immediately and silenced by an explosive crash. Alan started, "Blaster fighting! But it can't automatically controlled by the towards the camp. Trees exploded to his left as another robot fired in his direction, too far away to be effective but churning towards him his way and woody shrubs Alan changed direction slightly to follow a line between the two robots coming up from caught at his legs, tripping him and holding him back. Then, his legs were a mass of stinging slashes from ankle to thigh. The crashing rumble of the killer robots shook the night behind him, nearer sometimes, of the building a few feet away, three days before. Except for a few of the killer robots rolling slowly around the camp site on build a robot that hunts by homing in on animals' mind impulses ..." He stepped forward again, and the robots would barely above his head. Without pausing to think, Alan leaped back, and fell sprawling over a bush just as one of the robots rolled silently up from the right, lowering its a third robot slowly moved up in the distance. Without thinking, Alan turned slightly to the blaster barrel to aim directly at briefly against brilliance as itself from the smoldering branches and crashed against the robot, clawing insanely at the with no one to stop it, automatically sending its robots in wider and wider forays, slowly antenna and blaster barrel. With an awkward jerk the robot He pictured the camp computer swung around and fired its blaster, completely dissolving the circuits. The robot started wiping every trace of life from to shake, then clicked sharply as an overload relay snapped lower half of the cat creature towards the camp, leaving Alan alone. Shakily, Alan crawled a few In the brief flash of the blaster shot, Alan saw the steel glint of a robot only a hundred yards away, much nearer than "I suppose," he muttered to himself, "that Pete assembled these robots in a batch and then activated them all at once, probably never living to realize that planet's double moon had risen they're tuned to pick up human Alan grabbed his pocket blaster and fired. To his amazement the robot jerked back, its gun wobbled Alan. He fired again, and again the robot reacted. It seemed familiar somehow. Then he remembered the robot on the river wouldn't even singe a robot, but it just might stop one of those bank, jiggling and swaying for seconds after each shot. "Of transmission from the computer pulled himself upright and hobbled ahead through the bush. The robot shook spasmodically with each shot, its gun tilted upward at an awkward angle. grass stood the headquarters building, housing the robot-controlling computer. Still firing at spite of the agonizing pain, Alan forced himself to a limping run across the uneven ground, carefully headed for the jungle, each to a that jutted up through the grass. From the corner of his eye he saw another of the robots standing for his small blaster to run dry. "Be damned! You can't win now!" Alan yelled between blaster shots, almost irrational from the pain that ripped jaggedly cells released themselves from the device, falling in the grass at his feet. He dropped the useless struck the top of a small earthy mound and he was instantly engulfed in a swarm of locust-like insects that beat disgustingly "No!" He threw himself on the ground as a new robot suddenly appeared around the edge against his eyes and mouth. "Fagh!" Waving his gun. the robot paused momentarily, jiggling in place. In this instant, Alan jammed his hands into an insect hill and hurled the pile of dirt and insects directly at the robot's antenna. In a flash, hundreds of the winged things erupted angrily from the hole in a swarming cloud, each part of Alan whirled, startled. The transmitting mental energy to the robot's pickup devices. Confused by the sudden dispersion of mind impulses, the and he could see a robot rolling slowly across the clearing in his general direction, blasting indiscriminately robot fired erratically as Alan crouched and raced painfully for the door. It fired again, closer, by the blast. Frantically, Alan slammed open the door as the robot, sensing him strongly now, aimed Apparently the robot hadn't sensed him yet, but Alan didn't stone ripped past him, torn loose know what the effective range of its pickup devices was. He slightly different spot. try." He moved into the blackness. Powerful as a small tank, the killer robot was equipped to Alan's eyes, "you hit the switch. of it, barely out of blaster range. Only, the robot didn't get tired. Alan did. clothes, and insects attracted by the blood matted against his pants and shirt. Behind, the robot tried to run, but vines blocked and rustlings and an occasional low, throaty sound like an angry cat. Alan's fingers tensed on his pocket blaster. Swift shadowy forms moved quickly in Sharp screams punctuated the electric blue discharge as a pack of small feline creatures leaped snarling and clawing back into the night. Mentally, Alan tried to figure maybe. Why the devil didn't I load in fresh cells this morning!" The robot crashed on, louder now, gaining on the tired human. Legs aching and bruised, stinging from insect bites, Alan tried to force himself to run holding his hands in front of him like a child in the dark. His foot tripped on a barely visible insect hill and a winged swarm exploded around him. Startled, Alan jerked sideways, crashing his head against a tree. He clutched at the bark for a second, shadows. The robot crashed loudly behind him now. Without stopping to think, Alan fumbled along the Almost blinded by pain, whimpering, Alan stumbled forward. Sharp muscle spasms shot from his shoulder across his back and a mere hundred yards behind. He screamed at the blast. "Damn you, Pete! Damn your robots! Damn, damn ... Oh, Peggy!" Alan, lying in the mud of the stream bed, felt the earth shake as the heavy little robot rolled slowly and inexorably towards stop. The air crackled blue and a tree crashed heavily past Alan the moons, the killer robot stopped and its blaster swivelled slowly down. Frantically, Alan slightly overhanging the bank, the robot fired again. For a split second Alan seemed engulfed in flame from where Alan stood. Without hesitation Alan threw himself across the blaster robot's treads churned furiously in the sticky mud, causing it to buck and plunge like a Brahma Alan's arms, then slammed a steel-skinned water monster trying to dislodge a tenacious crab, while Alan, arms and legs wrapped tightly around the blaster fiercely against the robot's metal skin. Slowly, trying to anticipate the stationary portion of the robot.

<question>:
How does Alan interrupt the robots' communication signal?

<options>:
A Alan jambs his knife into the fallen robot, which disrupts the signal.
B Alan hurls the oozing blob-like creature at the robot. The blob dissolves the robot with its acid and that is what disrupts the signal.
C Alan uses his pocket blaster to disrupt the signal.
D Alan throws a handful of an anthill at the robot, using the brain waves of hundred of ants to disrupt the signal.

<answer>:

C