A) is a scientific technique for selecting ways to attract specific population samples B) is rarely done by consumer products companies C) only needs to be done once for each product D) should be redone periodically E) should be done every time a product enters a new stage of its life cycle A) is a scientific technique for selecting ways to attract specific population samples B) is rarely done by consumer products companies C) only needs to be done once for each product D) should be redone periodically E) should be done every time a product enters a new stage of its life cycle