Which example below best describes a longitudinal design in a descriptive research project? A. A panel that consists of households that provide purchasing information at specified intervals over an extended period. B. Surveys involving 600 mall intercepts in six major cities to determine the likes and dislikes of health food. C. A variety of promotional offers would be displayed in stores, with each group of customers seeing only one offer and the resulting brand sales determined. D. None of the above

The year is 2278, and the starship enterprise is running low on dilithium crystals, which are used to regulate the matter-antimatter reactions that propel the ship across the universe. without the crystals, space-time travel is not possible. if there is only one known source of dilithium crystals, the necessary conditions for a monopoly are met. part 2 (1 point)see hint if the crystals are government owned or government regulated, and the government wants to create the greatest welfare for society, then it should set the price choose one or more: a. so only the rich can afford space-time travel. b. at the profit-maximizing price. c. at the efficient price. d. using the marginal-cost pricing rule. e. so everyone can afford space-time travel. f. at the monopoly price.