Delta Products Inc. has recently switched at least partly from older technologies using fossil fuels to new technologies powered by electricity. The question has been raised whether it can be concluded that, for a given level of output, Delta’s operation now causes less fossil fuel to be consumed than it did formerly. The answer,clearly, is yes, since the amount of fossil fuel used to generate the electricity needed to power the new technologies is less than the amount needed to power the older technologies, provided level of output is held constant.In the argument given, the two boldfaced portions play which of the following roles?
Veterinarians generally derive some of their income from selling several manufacturers’ lines of pet-care products. Knowing that pet owners rarely throw away mail from their pet’s veterinarian unread, one manufacturer of pet-care products offered free promotional materials on its products to veterinarians for mailing to their clients. Very few veterinarians accepted the offer, however, even though the manufacturer’s products are of high quality.Which of the following, if true, most helps to explain the veterinarians’ reaction to the manufacturer’s promotional scheme?
Country X’s recent stock-trading scandal should not diminish investors’ confidence in the country’s stock market. For one thing, the discovery of the scandal confirms thatCountry X has a strong regulatory system, as the following considerations show. In any stock market, some fraudulent activity is inevitable. If a stock market is well regulated, anysignificant stock-trading fraud in it will very likely be discovered. This deters potential perpetrators and facilitates improvement in regulatory processes.In the argument, the portion in boldface plays which of the following roles?
Arts advocate: Few universities require that students who are specializing in science and technology take many art courses. However, real progress in science and technology requires an element of creativity, which the arts foster. Thus, to help science and technology students succeed in their careers, universities should increase the number of art courses required forthem.Which of the following would, if true, most strengthen the argument above?
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