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

<passage>:
Max Alben pulled the little red switch toward him. the trick is to do it before you have a chance to undo it! It was a good job and Max Alben knew whom he had to thank for it—his great-grandfather. This was the first time he had seen it, since he had been taught how to operate it on a dummy model, and now he stared at the great This machine, the pride and the hope of 2089, was something almost outside his powers of comprehension. But Max Alben knew how to run it, and he knew, roughly, what it was supposed to accomplish. He knew also that this was the first backward journey of any great duration and, being scientifically unpredictable, might well be the death of him. "Good old Giovanni Albeni," he muttered again affectionately. If his great-grandfather had not volunteered for the earliest And if that had not been discovered, the ruling powers of Earth, more than a century later, would never have plucked Max Alben out of an obscure civil-service job as a relief guard at the North American capacity for remaining conscious during time travel, Max Alben would not now be shifting from foot to foot in a physics laboratory, facing the black market kings of the world and awaiting their final instructions with an uncertain and submissive grin. Men like O'Hara, who controlled mushrooms, Levney, the blackberry tycoon, Sorgasso, the packaged-worm monopolist—would black marketeers Secretary-General of the United Nations looked back rapidly at the black market princes on the couches behind him. Since they stared back isn't it?" he asked, suddenly uncertain. "Yes, sir," one of the technicians standing by the time machine said respectfully. "The experiment with an atomic warhead guided missile and causing it, instead, to explode somewhere in the mid-Pacific, as originally planned." The Secretary-General of the United Nations beamed. "Thus preventing the Blight, making it nonexistent, as it were, producing a present-day Alben kept his eyes deferentially in their direction, too, as he had throughout this period of last-minute instruction. He knew who ruled his world—these stolid, well-fed men in clean garments with a minimum of patches, and where patches occurred, at least they were the color of the surrounding cloth. "He understands everything he has to understand," Gomez told him. "Let's get this thing moving." The old man smiled again. "Yes. Of course, Mr. Gomez." He came up to where Alben stood in the entrance of the time machine and handed the "I was just trying to explain a crucial final fact," the Secretary-General apologized. "A fact which may be highly—" "You've explained enough facts." Levney turned to the man inside the Max Alben gulped and nodded violently. He darted to the rear of the flick! It was a good job and Mac Albin knew whom he had to thank for it—his great-grandfather. "Good old Giovanni Albeni," he laughed as he looked at the morose faces of his two colleagues. Bob Skeat and Hugo Honek had done as much as he to build the tiny time machine in the secret lab under the helicopter garage, and they were fully as eager to go, but—unfortunately for father of two children, he was privileged to wear, and wriggled into the housing of the complex little mechanism. This was hardly the first time he had seen it, since he'd been helping to build the device from the moment Honek had nodded and risen from the drafting board, being put into operation. But it meant a lot more to Mac Albin than merely saving a world. It meant an adventurous mission with the risk of research science in which to specialize. In the flabby, careful, life-guarding world the Earth had become, Mac Albin would never have been reluctantly selected by his two co-workers as the one to carry the forbidden banner of dangerous experiment. laboriously working out dreary gene problems instead of embarking on the greatest adventure Man had known to date. "Take it easy, Mac," Bob Skeat said as he handed the metal box to Albin. "The Security Council is just trying to solve the problem in their way, the conservative way: a worldwide concentration on genetics the same point in time to change them." Albin laughed. "That's just looking for trouble." "Maybe it is, but that's my job. Hugo's the designer of the time machine and you're the operator, but I'm the theoretical man in this research team. It's my job to look for trouble. So, just in case, I The small fat man exasperatedly hit the side of the time machine with and autonomous to all possible futures. It's my hunch that something that's immersed in it will not be altered by a new time sequence." "Remind him to be careful, Bob," Honek rumbled. "He thinks he's Captain forces that drove the time machine. flick! It was strange, Max Alben reflected, that this time travel business, which knocked unconscious everyone who tried it, only made him feel slightly dizzy. That was because he was descended from Giovanni Albeni, He stopped and scratched his dirt-matted hair. Wasn't there something he was supposed to do a second before materialization? Yes, that was usually the most that could be expected, a two-child parent being quite rare and a three-child parent almost unknown. Strict eugenic control was instituted by the Security Council of the United Nations so that fertile men and women would not be wasted upon non-fertile mates. Fertility was the most important avenue to social some form of scientific research to some extent. Since the population was now so limited in proportion to the great resources available, all physical labor had long been done by robots. The government saw to it that everybody had an ample supply of goods and, in return, asked only that they experiment without any risk to their own lives—every human through time to the eighteenth, the day of the infamous Guided Missile Experiment. Carefully, carefully, like an obstetrician supervising surgical robots at an unusually difficult birth, he watched the exactly crucial moment. Then he pushed a button and froze the machine But.... He paused and tapped at his sleek chin. He was supposed to do something a second before materialization. Yes, that nervous theoretician, Bob Skeat, had given him a last suggestion. simplicity, like a textbook composed by a stuffy pedagogue for the use of morons. The problems all began with the Guided Missile Experiment of 1976, he jungle through some absolutely unforgivable error in the remote-control station, the officer in charge of the station was reprimanded and the As the equipment of the remote-control station began to take on a blurred reality all around him, Max Alben felt a bit of fear at what he was doing. The technicians, he remembered, the Secretary-General, even the black market kings, had all warned him not to go ahead with his instructions if anything unusual turned up. That was an awful lot of power to disobey: he knew he should return with this new information and let better minds work on it. care of you and that treasured your children. A man like himself, with five children—why, he'd be a big man, maybe the biggest man on Earth! And he'd have robots to work for him and lots of food. Above all, lots and lots of food. He'd even be a scientist— everyone He materialized the time machine around the green instrument panel, sweating a bit at the sight of the roomful of military figures, despite the technicians' reassurances that all this would be happening too fast Max Alben pulled the little red switch toward him. reality all around him, Mac Albin felt a bit of shame at what he was doing. He'd promised Bob and Hugo to drop the experiment at any stage if a new factor showed up. He knew he should go back with this new information and have all three of them kick it around. tired to the tip of his uncalloused fingers, tired to the recesses of his unused muscles. He was tired of having to undertake a simple duped by the technicians into permitting the experiment they had not

<question>:
Why did Max need to be the one to use the machine?

<options>:
A He was the only one who could stay conscious in it
B He had built it
C His coworkers insisted that he do it
D He was in charge of the project

<answer>:

A