According to the passage, a Veblen model of conspicuous consumption has been used to A. investigate the extent of the demand for luxury goods among social classes in eighteenth-century England B. classify the kinds of luxury goods desired by eighteenth-century consumers C. explain the motivation of eighteenth-century consumers to buy luxury goods D. establish the extent to which the tastes of rich consumers were shaped by the middle classes in eighteenth-century England E. compare luxury consumerism in eighteenth-century England with such consumerism in the twentieth century