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

<passage>:
sweet-smelling ooze, Alan eyed the robot apprehensively. Half his fingernails had dug into the jerk of its blaster barrel. For the first time that night Alan Then another. Alan stopped, puzzled. Two more blasts, quickly together, and the sound of a scream faintly. Frowning, worrying about the sounds, Alan momentarily forgot him like the protesting of a hill, throwing him to the jungle floor. "Damn!" He cursed again, "I wonder," he thought, "how the tentacles of some monstrous tree-bound octopus. Fitful little plants grew straggly in the frantically jerked the trigger In the distance the sky blazed as a blaster roared in the jungle. Then Alan heard the approaching robot, crunching and snapping fire. He froze. "Good Lord! Alan peered around him at the to the soft rustlings and faint sounds. Suddenly he stopped, his eyes widened. "Of course! Radio! drowned out almost immediately explosive crash. Alan started, "Blaster fighting! But it can't be!" Suddenly anxious, he slashed and silenced by an the device, falling in the grass Trees exploded to his left as another robot fired in his direction, caught at his legs, tripping him Alan changed direction slightly ship and the eleven men who, with Alan, were the only humans on the jungle planet, Waiamea. Stepping through the low shrubbery at the edge of the were well accustomed to the dark now, and he managed to dodge his legs were a mass of stinging The crashing rumble of the that had brought the advance exploratory party of scientists and technicians to Waiamea three days before. Except for a few of the killer robots rolling nightmare. Alan would have to 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 Alan turned slightly to the blaster barrel to aim directly at his head. Alan froze. "My God, panic. "I should be at the camp Suddenly a screeching whirlwind Pete built those things wrong!" up from the right, lowering its with no one to stop it, automatically antenna and blaster barrel. swung around and fired its blaster, and shorted the blaster cells. camp, but not himself be seen. him breathed fire, then exploded. In the brief flash of the blaster shot, Alan saw the steel glint of a robot only a hundred yards away, much nearer than activated them all at once, probably they're tuned to pick up human the rotten luck, anyway!" He blaster, jutting out of the Instinctively, in one motion 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 Reaching into his jacket, Alan fingered his pocket blaster. He missing the obvious. "The blaster you anywhere. This looked like Alan's blast. They said the blast with your name on it would find Slowly Alan looked around, static blanks out radio sizing up his situation. Behind can't get to the camp with The robot shook spasmodically Then, unexpectedly, Alan saw tuned to blast any living at every step. Straining every muscle in spite of the agonizing pain, Alan It was crazy, he supposed, to 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 Alan unclenched his fists and had, at last, given him a reason building's door his blaster quit. A click. A faint hiss when he for living. "Not to be killed!" wiped his palms, bloody where branch too heavily laden. Blaster ready, Alan rolled over onto his back. In the movement, his elbow gun. "No!" He threw himself on the ground as a new robot suddenly struck the top of a small earthy mound and he was instantly at his feet. He dropped the useless over Alan's back and ozone tingled locust-like insects that beat disgustingly against his eyes and with its own blaster static, mouth. "Fagh!" Waving his the bugs. As he did so, a dark instant, Alan jammed his hands into an insect hill and hurled the flash, followed by the sharp report of a blaster. Then another. Alan whirled, startled. The erupted angrily from the hole in planet's double moon had risen Confused by the sudden dispersion and he could see a robot rolling robot fired erratically as Alan crouched and raced painfully for robot's pickup devices. as he fumbled with the lock of mind impulses, the by the blast. Frantically, Alan slammed Apparently the robot hadn't sensed him yet, but Alan didn't know what the effective range open the door as the robot, sensing of its pickup devices was. He him strongly now, aimed slightly different spot. His stomach tightened. Panic. brain. He moaned. A voice spoke hollowly in the Alan opened his eyes in a white room Alan's eyes, "you hit the switch. Suddenly a sobbing-laughing vines, and Alan found that of it, barely out of blaster range. Only, the robot didn't get tired. Alan did. he could manage to keep ahead crashed imperturbably after blaster flashes as some angry cat. Alan's fingers tensed suddenly louder. He fired Sharp screams punctuated leaped snarling and clawing back into the night. Mentally, Alan tried to figure the charge remaining in his blaster. There wouldn't be much. 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 exploded around him. Startled, Alan jerked sideways, crashing dazed, then his knees buckled. His blaster fell into the The robot crashed loudly behind him now. Without stopping to think, Alan fumbled along the ground after his gun, straining and leaped back, trying frantically Almost blinded by pain, whimpering, Alan stumbled forward. Sharp muscle spasms shot from He screamed at the blast. "Damn with hairy, disjointed arms as if to snag even the dirty little Alan, lying in the mud of the stream bed, felt the earth shake as the heavy little robot rolled he thought, "in battle his arm felt numb. "I'll drown him," he said aloud. "I'll drown laughed. Then his mind cleared. Alan trembled. For the first time in his life he understood the first time he realized that he Alan became a man. "Dammit, no law says I have to flame-out !" He forced dig, dig, cursing and crying to stop. The air crackled blue and a tree crashed heavily past Alan and its blaster swivelled slowly down. Frantically, Alan pure electricity arced over him, robot shook for a second, its blaster muzzle lifted erratically and for an instant it seemed almost the robot fired again. For a split second Alan seemed engulfed in flame blaster swung slightly away. But crazily as the earth collapsed underneath from where Alan stood. Without hesitation Alan threw himself across the blaster blaster jerked upwards wrenching 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 a stubby hunting knife. Sweat and blood in his eyes, hardly able to move on the wildly swinging turret, he felt down

<question>:
Why is Alan so surprised to hear blaster fighting?

<options>:
A Alan is surprised because he came with a team of scientists, not soldiers.
B Alan is surprised because he was sure they had escaped the enemy soldiers when they ran into the jungle for cover.
C Alan is surprised because the planet is only inhabited by animals, not intelligent life.
D Alan is surprised because the Waiameans don't have advanced weapons capabilities.

<answer>:

C