 What is the most likely reason for the junior achievement group's shared characteristics?
SCHOENHERR "What would you think," I asked Marjorie over supper, "if I should undertake to lead a junior achievement group this summer?" "Why, Donald," she said, "it could be quite interesting, if I understand what a junior achievement group is. It's a privilege which I'm sure many educators must envy, teaching in Ridgeville, for our new school is a fine one, and our academic standards are high. It is an uneasy privilege then, at least sometimes, to teach my old-fashioned brand of science to these children of a new age. "It has the purpose," I told her, "of teaching the members something about commerce and industry. They manufacture simple compositions like polishing waxes and sell them from door-to-door. Some groups have built up tidy little bank accounts which are available for later educational expenses." Marjorie put back her head and laughed, and I was forced to join her, for we both recognize that my understanding and "feel" for commercial matters—if I may use that expression—is almost nonexistent. When Ridgeville moved to its present site, so, of course, did we, which meant starting mortgage payments all over again. This was to be our headquarters and factory for the summer—a roomy unused barn belonging to the parents of one of the group members, Tommy Miller. The three who were sitting to my left were the ones who had proposed the group in the first place. Mary McCready was a big husky redhead of twelve, with a face full of freckles and an infectious laugh, and Tommy Miller, a few months younger, was just an average, extroverted, well adjusted youngster, noisy and restless, tee-shirted and butch-barbered. "Well, Mr. Henderson, a junior achievement group is a bunch of kids who get together to manufacture and sell things, and maybe make some money." The usual products, of course, with these junior achievement efforts, are chemical specialties that can be made safely and that people will buy and use without misgivings—solvent to free up rusty bolts, cleaner to remove road tar, mechanic's hand soap—that sort of thing. "The Miller boy and Mary McCready," he had said, "have exceptionally high IQ's—around one forty or one fifty. They have some of the attributes of exceptional pupils, but much of the time they seem to have little interest in their studies. The junior achievement idea has sparked their imaginations.
 Their parents are all members of the Ridgeville Commission
 They have experienced expected and unanticipated consequences of nuclear fallout  Their parents are all members of the Ridgeville Commission  They are all actually androids that have been programmed by scientists of the Ridgeville Commission  They have been meeting secretly for years before they came together under the guise of the junior achievement group